Electromagnetic spectrum

1. LIGHT
(Electromagnetism)

2. LIGHT
(Electromagnetism)

4. LIGHT IS ODD...

5. LIGHT IS ODD...
Light has a split personality.

6. LIGHT IS ODD...
Light has a split personality.

7. LIGHT IS ODD...
Light has a split personality.
Sometimes it acts
as we think it
should.

8. LIGHT IS ODD...
Light has a split personality.
Sometimes it acts
as we think it
should.

9. LIGHT IS ODD...
Light has a split personality.
Sometimes it acts And sometimes it
as we think it doesn’t.
should.

10. LIGHT IS ODD...
Light has a split personality.
Sometimes it acts And sometimes it
as we think it doesn’t.
should.
Sometimes light acts as though it is made of tiny
particles of energy, called photons.

11. LIGHT IS ODD...
Light has a split personality.
Sometimes it acts And sometimes it
as we think it doesn’t.
should.
Sometimes light acts as though it is made of tiny
particles of energy, called photons.

12. LIGHT IS ODD...
Light has a split personality.
Sometimes it acts And sometimes it
as we think it doesn’t.
should.
Sometimes light acts as though it is made of tiny
particles of energy, called photons.

13. LIGHT IS ODD...
Light has a split personality.
Sometimes it acts And sometimes it
as we think it doesn’t.
should.
Sometimes light acts as though it travels in waves.

14. LIGHT IS ODD...
Light has a split personality.
Sometimes it acts And sometimes it
as we think it doesn’t.
should.
Sometimes light acts as though it travels in waves.

15. LIGHT IS ODD...
Light has a split personality.
Sometimes light acts as though it travels in waves.

16. LIGHT IS ODD...
Light has a split personality.

17. LIGHT IS ODD...
Light has a split personality.

18. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle
p

19. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p

20. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Neither way of thinking about light is better than
the other. Neither is good or bad.

21. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Neither way of thinking about light is better than
the other. Neither is good or bad.

22. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Neither way of thinking about light is better than
the other. Neither is good or bad.
In fact, light travels as both particles and waves.....

23. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Neither way of thinking about light is better than
the other. Neither is good or bad.
In fact, light travels as both particles and waves.....

24. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Neither way of thinking about light is better than
the other. Neither is good or bad.
In fact, light travels as both particles and waves.....
AT THE SAME TIME!!!

25. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p

26. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Since light behaves as both particles...

27. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Since light behaves as both particles...

28. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Since light behaves as both particles...
and as waves...

29. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Since light behaves as both particles...
and as waves...

30. LIGHT IS ODD...
Light has a split personality.
s!
ar ticle waves!
p
Since light behaves as both particles...
and as waves...
light is neither just particles nor just waves.

33. How many people does it take to
fight in a dual?

34. How many people does it take to
fight in a dual?
Do they need to fight at the same time?

35. How many people does it take to
fight in a dual?
Do they need to fight at the same time?

36. How many people does it take to
fight in a dual?
Do they need to fight at the same time?
How many people does it
take to sing a duet?

37. How many people does it take to
fight in a dual?
Do they need to fight at the same time?
How many people does it
take to sing a duet?
Are they singing together at the
same time?

38. How many people does it take to
fight in a dual?
Do they need to fight at the same time?
How many people does it
take to sing a duet?
Are they singing together at the
same time?

39. How many people does it take to
fight in a dual?
Do they need to fight at the same time?
How many people does it
take to sing a duet?
Are they singing together at the
same time?
What is the Italian word for “two”?

40. How many people does it take to
fight in a dual?
Do they need to fight at the same time?
How many people does it
take to sing a duet?
Are they singing together at the
same time?
What is the Italian word for “two”?
due

42. As light travels, it travels as both particles and as waves.

43. As light travels, it travels as both particles and as waves.

44. As light travels, it travels as both particles and as waves.
That’s two things at the same time.

45. As light travels, it travels as both particles and as waves.
That’s two things at the same time.
This property of light is called the...

46. As light travels, it travels as both particles and as waves.
That’s two things at the same time.
This property of light is called the...
wave-particle duality.

47. As light travels, it travels as both particles and as waves.
That’s two things at the same time.
This property of light is called the...
wave-particle duality.
We’re going to spend more time speaking of light as a
wave because it is generally more useful in the study of
chemistry and atoms.

48. All waves of light have 4 things in common:

49. All waves of light have 4 things in common:

50. All waves of light have 4 things in common:
1) They all are in constant motion (always moving).

51. All waves of light have 4 things in common:
1) They all are in constant motion (always moving).
All lightwaves travel at the same speed while in a
vacuum (no air, no water, just space)

52. All waves of light have 4 things in common:
1) They all are in constant motion (always moving).
All lightwaves travel at the same speed while in a
vacuum (no air, no water, just space)
the speed of light in a vacuum, c = 3.0 x 10 8 m/s

53. All waves of light have 4 things in common:
1) They all are in constant motion (always moving).
All lightwaves travel at the same speed while in a
vacuum (no air, no water, just space)
the speed of light in a vacuum, c = 3.0 x 10 8 m/s
That’s about 671 million miles per hour!

54. All waves of light have 4 things in common:

55. All waves of light have 4 things in common:
2) All waves have a frequency.

56. All waves of light have 4 things in common:
2) All waves have a frequency.

57. All waves of light have 4 things in common:
2) All waves have a frequency.
Count how many crests (peaks) of the wave pass by
some arbitrary (random) point in one second.

58. All waves of light have 4 things in common:
2 1
2) All waves have a frequency.
Count how many crests (peaks) of the wave pass by
some arbitrary (random) point in one second.

59. All waves of light have 4 things in common:
2 1
2) All waves have a frequency.
Count how many crests (peaks) of the wave pass by
some arbitrary (random) point in one second.

60. All waves of light have 4 things in common:
2 1
2) All waves have a frequency.
Count how many crests (peaks) of the wave pass by
some arbitrary (random) point in one second.
Frequency is how many crests pass by a given point in one
second.

61. All waves of light have 4 things in common:
2 1
2) All waves have a frequency.
Count how many crests (peaks) of the wave pass by
some arbitrary (random) point in one second.
Frequency is how many crests pass by a given point in one
second.
Frequency is measured in waves /second or Hertz (Hz)

62. All waves of light have 4 things in common:
2) All waves have a frequency.

63. All waves of light have 4 things in common:
2) All waves have a frequency.
Count how many crests of each wave pass by some
arbitrary (random) point in one second.

64. All waves of light have 4 things in common:
2 1
1
2) All waves have a frequency.
Count how many crests of each wave pass by some
arbitrary (random) point in one second.

65. All waves of light have 4 things in common:
2 1
1
2) All waves have a frequency.
Count how many crests of each wave pass by some
arbitrary (random) point in one second.
The purple wave has a frequency of 2 waves/second.

66. All waves of light have 4 things in common:
2 1
1
2) All waves have a frequency.
Count how many crests of each wave pass by some
arbitrary (random) point in one second.
The purple wave has a frequency of 2 waves/second.
frequency = 2 1/s or 2 Hz

67. All waves of light have 4 things in common:
2 1
1
2) All waves have a frequency.
Count how many crests of each wave pass by some
arbitrary (random) point in one second.
The purple wave has a frequency of 2 waves/second.
frequency = 2 1/s or 2 Hz
The orange wave has a frequency of 1 wave/second.

68. All waves of light have 4 things in common:
2 1
1
2) All waves have a frequency.
Count how many crests of each wave pass by some
arbitrary (random) point in one second.
The purple wave has a frequency of 2 waves/second.
frequency = 2 1/s or 2 Hz
The orange wave has a frequency of 1 wave/second.
frequency = 1 1/s or 1 Hz

69. All waves of light have 4 things in common:

70. All waves of light have 4 things in common:
3) All waves have a wavelength.

71. All waves of light have 4 things in common:
3) All waves have a wavelength.
The purple wave has a higher frequency because it has
a shorter wavelength.

72. All waves of light have 4 things in common:
3) All waves have a wavelength.
The purple wave has a higher frequency because it has
a shorter wavelength.
Wavelengths are measured from crest to crest....

73. All waves of light have 4 things in common:
3) All waves have a wavelength.
The purple wave has a higher frequency because it has
a shorter wavelength.
Wavelengths are measured from crest to crest....

74. All waves of light have 4 things in common:
3) All waves have a wavelength.
The purple wave has a higher frequency because it has
a shorter wavelength.
Wavelengths are measured from crest to crest....
or from trough to trough.

75. All waves of light have 4 things in common:
3) All waves have a wavelength.
The purple wave has a higher frequency because it has
a shorter wavelength.
Wavelengths are measured from crest to crest....
or from trough to trough.

76. All waves of light have 4 things in common:
3) All waves have a wavelength.
The purple wave has a higher frequency because it has
a shorter wavelength.
Wavelengths are measured from crest to crest....
or from trough to trough.
Wavelengths vary considerably. Long waves are usually
measured in meters (m), and short waves are usually
measured in nanometers (nm).

77. All waves of light have 4 things in common:
wavelength is
abbreviated by:
3) All waves have a wavelength.
The purple wave has a higher frequency because it has
a shorter wavelength.
Wavelengths are measured from crest to crest....
or from trough to trough.
Wavelengths vary considerably. Long waves are usually
measured in meters (m), and short waves are usually
measured in nanometers (nm).

78. All waves of light have 4 things in common:
wavelength is
abbreviated by:
λ
3) All waves have a wavelength.
The purple wave has a higher frequency because it has
a shorter wavelength.
Wavelengths are measured from crest to crest....
or from trough to trough.
Wavelengths vary considerably. Long waves are usually
measured in meters (m), and short waves are usually
measured in nanometers (nm).

79. All waves of light have 4 things in common:
3) All waves have a wavelength.

80. All waves of light have 4 things in common:
3) All waves have a wavelength.
1 m = 1.0 x 109 nm

81. All waves of light have 4 things in common:
3) All waves have a wavelength.
1 m = 1.0 x 109 nm
The wavelength of a wave helps determine its:

82. All waves of light have 4 things in common:
3) All waves have a wavelength.
1 m = 1.0 x 109 nm
The wavelength of a wave helps determine its:
frequency

83. All waves of light have 4 things in common:
3) All waves have a wavelength.
1 m = 1.0 x 109 nm
The wavelength of a wave helps determine its:
frequency energy

84. All waves of light have 4 things in common:
3) All waves have a wavelength.
1 m = 1.0 x 109 nm
The wavelength of a wave helps determine its:
frequency energy type

85. All waves of light have 4 things in common:

86. All waves of light have 4 things in common:
4) All waves have an amplitude.

87. All waves of light have 4 things in common:
4) All waves have an amplitude.
Amplitude is measured from the midline up or from
the midline down.

88. All waves of light have 4 things in common:
4) All waves have an amplitude.
Amplitude is measured from the midline up or from
the midline down.

89. All waves of light have 4 things in common:
4) All waves have an amplitude.
Amplitude is measured from the midline up or from
the midline down.

90. All waves of light have 4 things in common:
4) All waves have an amplitude.
Amplitude is measured from the midline up or from
the midline down.

91. All waves of light have 4 things in common:
4) All waves have an amplitude.
Amplitude is measured from the midline up or from
the midline down.

92. All waves of light have 4 things in common:
4) All waves have an amplitude.
Amplitude is measured from the midline up or from
the midline down.
Think of waves crashing on the shore. The taller they are,
more intensely they crash.

93. All waves of light have 4 things in common:
4) All waves have an amplitude.
Amplitude is measured from the midline up or from
the midline down.
Think of waves crashing on the shore. The taller they are,
more intensely they crash.
The height (amplitude) of a light wave also gives an idea
of its intensity. We call light intensity, “brightness.”

96. A

97. A
B

98. A
B
Which wave has a longer wavelength?

99. A
B
Which wave has a longer wavelength? A

100. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency?

101. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B

102. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)?

103. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither

104. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither

105. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither

106. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude?

107. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither

108. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither
Which wave has more energy?

109. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither
Which wave has more energy? B

110. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither
Which wave has more energy? B
As frequency increases, wavelength...

111. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither
Which wave has more energy? B
As frequency increases, wavelength... decreases

112. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither
Which wave has more energy? B
As frequency increases, wavelength... decreases
As energy decreases, frequency...

113. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither
Which wave has more energy? B
As frequency increases, wavelength... decreases
As energy decreases, frequency... decreases

114. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither
Which wave has more energy? B
As frequency increases, wavelength... decreases
As energy decreases, frequency... decreases
As wavelength decreases, energy...

115. A
B
Which wave has a longer wavelength? A
Which wave has a higher frequency? B
Which wave would be more intense (brighter)? neither
Which wave has a greater amplitude? neither
Which wave has more energy? B
As frequency increases, wavelength... decreases
As energy decreases, frequency... decreases
As wavelength decreases, energy... increases

116. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED

117. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED
E = hf

118. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED
E = hf f = c/λ

119. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED
E = hf f = c/λ
h (Planck’s constant) = 6.626 x 10-34 J x s

120. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED
E = hf f = c/λ
h (Planck’s constant) = 6.626 x 10-34 J x s
c (speed of light in a vacuum) = 3.0 x 10 8 m/s

121. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED
E = hf f = c/λ
h (Planck’s constant) = 6.626 x 10-34 J x s
c (speed of light in a vacuum) = 3.0 x 10 8 m/s
If E = hf and f = c/λ...

122. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED
E = hf f = c/λ
h (Planck’s constant) = 6.626 x 10-34 J x s
c (speed of light in a vacuum) = 3.0 x 10 8 m/s
If E = hf and f = c/λ...
E = hf

123. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED
E = hf f = c/λ
h (Planck’s constant) = 6.626 x 10-34 J x s
c (speed of light in a vacuum) = 3.0 x 10 8 m/s
If E = hf and f = c/λ...
E = hf

124. WAVELENGTH, FREQUENCY AND ENERGY
ARE RELATED
E = hf f = c/λ
h (Planck’s constant) = 6.626 x 10-34 J x s
c (speed of light in a vacuum) = 3.0 x 10 8 m/s
If E = hf and f = c/λ...
E = hf c
λ

127. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN

128. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN

129. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN
LONGEST WAVES

130. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN
LONGEST WAVES SHORTEST WAVES

131. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN
LONGEST WAVES SHORTEST WAVES
LOWEST
FREQUENCY

132. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN
LONGEST WAVES SHORTEST WAVES
LOWEST
FREQUENCY

133. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN
LONGEST WAVES SHORTEST WAVES
LOWEST HIGHEST
FREQUENCY FREQUENCY

134. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN
LONGEST WAVES SHORTEST WAVES
LOWEST HIGHEST
FREQUENCY FREQUENCY

135. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN
LONGEST WAVES SHORTEST WAVES
LOWEST HIGHEST
FREQUENCY FREQUENCY
LOWEST ENERGY

136. L ET
ES IO
IO W (AV IR) AV )
D RO D TR (UV AYS MA
RA IC RE UL -R AM
M FRA X G
IN
LONGEST WAVES SHORTEST WAVES
LOWEST HIGHEST
FREQUENCY FREQUENCY
LOWEST ENERGY HIGHEST ENERGY

137. HOW MUCH OF THE ELECTROMAGNETIC SPECTRUM CAN
WE SEE?

138. HOW MUCH OF THE ELECTROMAGNETIC SPECTRUM CAN
WE SEE?
2500 miles

139. HOW MUCH OF THE ELECTROMAGNETIC SPECTRUM CAN
WE SEE?
2500 miles

140. HOW MUCH OF THE ELECTROMAGNETIC SPECTRUM CAN
WE SEE?
2500 miles

141. HOW MUCH OF THE ELECTROMAGNETIC SPECTRUM CAN
WE SEE?
2500 miles
700 nm 400 nm

142. HOW MUCH OF THE ELECTROMAGNETIC SPECTRUM CAN
WE SEE?
2500 miles
700 nm 400 nm
Wavelengths that are longer or shorter than this
we cannot see!

143. White light is made
of ROYGBIV

144. White light is made
of ROYGBIV

145. White light is made
of ROYGBIV

146. White light is made
of ROYGBIV

147. White light is made
of ROYGBIV

148. White light is made
of ROYGBIV

149. White light is made
of ROYGBIV

150. White light is made
of ROYGBIV

151. White light is made
of ROYGBIV

152. White light is made
of ROYGBIV
Different wavelengths bend (refract)
different amounts when slowed

153. WHY DOES LIGHT SLOW DOWN?

154. WHY DOES LIGHT SLOW DOWN?
c = 3.0 x 10 8 m/s

155. WHY DOES LIGHT SLOW DOWN?
c = 3.0 x 10 8 m/s ...in a vacuum

156. WHY DOES LIGHT SLOW DOWN?
c = 3.0 x 10 8 m/s ...in a vacuum
Going through any other medium (water, air, glass) it slows ever
so slightly.

157. WHY DOES LIGHT SLOW DOWN?
c = 3.0 x 10 8 m/s ...in a vacuum
Going through any other medium (water, air, glass) it slows ever
so slightly.
When it slows it bends or refracts. The shorter the wavelength,
the greater the effect of bending.

158. WHY DOES LIGHT SLOW DOWN?
c = 3.0 x 10 8 m/s ...in a vacuum
Going through any other medium (water, air, glass) it slows ever
so slightly.
When it slows it bends or refracts. The shorter the wavelength,
the greater the effect of bending.

159. WHY DOES LIGHT SLOW DOWN?
c = 3.0 x 10 8 m/s ...in a vacuum
Going through any other medium (water, air, glass) it slows ever
so slightly.
When it slows it bends or refracts. The shorter the wavelength,
the greater the effect of bending.

160. WHY DOES LIGHT SLOW DOWN?
c = 3.0 x 10 8 m/s ...in a vacuum
Going through any other medium (water, air, glass) it slows ever
so slightly.
When it slows it bends or refracts. The shorter the wavelength,
the greater the effect of bending.

161. WHY DOES LIGHT SLOW DOWN?
c = 3.0 x 10 8 m/s ...in a vacuum
Going through any other medium (water, air, glass) it slows ever
so slightly.
When it slows it bends or refracts. The shorter the wavelength,
the greater the effect of bending.

162. White light is made
of ROYGBIV
Different wavelengths bend (refract)
different amounts when slowed

163. White light is made
of ROYGBIV
Different wavelengths bend (refract)
different amounts when slowed

164. White light is made
of ROYGBIV
Different wavelengths bend (refract)
different amounts when slowed

165. White light is made
of ROYGBIV
Different wavelengths bend (refract)
different amounts when slowed

166. White light is made
of ROYGBIV
Different wavelengths bend (refract)
different amounts when slowed

167. HOW DO WE SEE A RAINBOW?

168. HOW DO WE SEE A RAINBOW?
raindrop

169. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

170. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

171. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

172. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

173. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

174. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

175. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

176. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

177. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

178. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

179. HOW DO WE SEE A RAINBOW?
raindrop
sunlight

180. HOW DO WE SEE A RAINBOW?
raindrop
sunlight
In order for you to see
a rainbow, the sun must
be behind you.

181. HOW DO WE SEE A RAINBOW?
raindrop
sunlight
In order for you to see
a rainbow, the sun must
be behind you.
This is why you
rarely see a
rainbow midday.

183. We often say that white light is made of all the colors the rainbow.
We need only 3 colors (primary colors) to make white light.

184. We often say that white light is made of all the colors the rainbow.
We need only 3 colors (primary colors) to make white light.
Do you know what the 3 primary colors of light are?

185. We often say that white light is made of all the colors the rainbow.
We need only 3 colors (primary colors) to make white light.
Do you know what the 3 primary colors of light are?

186. We often say that white light is made of all the colors the rainbow.
We need only 3 colors (primary colors) to make white light.
Do you know what the 3 primary colors of light are?

187. We often say that white light is made of all the colors the rainbow.
We need only 3 colors (primary colors) to make white light.
Do you know what the 3 primary colors of light are?

188. We often say that white light is made of all the colors the rainbow.
We need only 3 colors (primary colors) to make white light.
Do you know what the 3 primary colors of light are?