DEEPEN.docx

1. FOURTH QUARTER
GENERAL PHYSICS 2 WEEK 3 MODULE 3
Name: CAOILE, MARIANE JO B.
Section: XII-EINSTEIN
JUMPSTART
1. D
2. B
3. B
4. D
5. C
EXPLORE
1. State Snell’s law.
The ratio of the sine of the incidence angle to the sine of the refraction angle is a constant, this
ratio or constant is known as the refraction index.
2. Explain the dispersion of light.
When white light passes through a prism, it split into its color spectrum. This breaking up and
spreading out of the light beam is referred to as dispersion or chromatic dispersion. Furthermore,
in nature dispersion occurs as a result of the interaction of sunlight and water droplets.
3. Which has a greater optical density, water or air? When light crosses over from water to air,
does it bend towards or away from the normal?
Water has a greater optical density, when light crosses over from water to air, it bent away from the
normal.
4. Explain the phenomenon called total internal reflection?
When a ray of light in a medium with a higher index of refraction approaches the other medium at
an angle of incidence greater than the critical angle, this occurs at the boundary between two
transparent media. When the incident rays’ angle of incidence exceeds the critical angle, it is
reflected back into the medium.
5. How does polarization reduce glare?
A vertical pattern helps some of the light passes through the openings, which reorganizes light.
This pattern blocks the light that is horizontal and only allows vertical light to reduce glare.

2. DEEPEN
PERFORMANCE TASKS
“Life without light”
Photographs Art Exhibit
A.

3. B.
1. GHOST FUNGUS
Habitat: branches of trees
Chemicals involved: oxygen
Chemical reaction responsible for the bioluminescence:
luciferin
2. FIREFLY
Habitat: ponds, streams, rivers, marshy areas, and small
depressions full of water
Chemicals involved: oxygen and calcium
Chemical reaction responsible for the bioluminescence:
luciferase
3. SEA PEN
Habitat: Ocean
Chemicals involved: oxygen
Chemical reaction responsible for the bioluminescence:
luciferin
4. OSTRACODS
Habitat: Deep Ocean
Chemicals involved: oxygen
Chemical reaction responsible for the bioluminescence:
luciferin
5. JELLYFISH
Habitat: Ocean
Chemicals involved: oxygen
Chemical reaction responsible for the bioluminescence:
siphonophores
6. VIPERFISH
Habitat: Deep Ocean
Chemicals involved: oxygen
Chemical reaction responsible for the bioluminescence:
photophores

4. 7. MARINE HATCHERFISH
Habitat: Deep Ocean
Chemicals involved: oxygen
Chemical reaction responsible for the bioluminescence:
photophores
8. FOXFIRE
Habitat: braches of trees
Chemicals involved: oxygen
Chemical reaction responsible for the bioluminescence:
luciferin
9. NOCTILUCA SCINTILLANS
Habitat: tropical oceans
Chemicals involved: oxygen
Chemical reaction responsible for the bioluminescence:
luciferase
10. LATIA
Habitat: clean running streams and rivers
Chemicals involved: flavoprotein enzyme
Chemical reaction responsible for the bioluminescence:
luciferase
C.
Activity about EM wave:
Slinky wave spectrum Objective:
1. To be able to determine the different types of waves found on electromagnetic spectrum.
2. To be able to distinguish the movement of EM wave.
3. To be able to define electromagnetic spectrum on EM wave.
Materials:
- Diagram of electromagnetic spectrum
- Slinky toys
Procedures:
1. Use the diagram as reference to the wavelength and frequency of different types of EM waves.
2. Hold the one end of the slinky toy while the partner hold the other.
3. You should stand so that the spring is stretched about 6 ft between each pair.

5. 4. Create a transverse wave by moving the spring to the left and right like a snake on the ground.
5. Recreate what the wave would look like if it was in slow and fast version.
6. Observe and determine the different types of EM wave on the electromagnetic spectrum.
Question:
1. How did the spring define the electromagnetic spectrum?
2. Why do you have to move the spring faster or lower depending on the type of EM wave?
Conclusion
Based on the activity, explain how electromagnetic spectrum occurs on spring depending on the type of
EM wave.
Activity about total internal reflection:
Laser light in clear glass with water Objective:
1. To be able to understand how total interval reflection occurs.
2. To be able to observe total interval reflection.
Materials:
- Clear glass
- Water
- Laser pointer (color red)
- Powdered milk
- Illustration board (12 inches on a side to stretch across the top of clear glass) Procedure:
1. Fill the clear glass almost full of water but leave about 5 cm unfilled.
2. Mix a less than teaspoon of powdered milk and stir.
3. Shine the laser pointer from the outside of one end of the glass near the bottom, so that the light
comes out through the surface of the water and you should be able to see the red path of the
laser as it passes through the water with powdered milk.
4. Start over if the laser light is quickly alternated inside the clear glass, you have put too much
powdered milk into the water.
5. Shine the laser again so that it reflects on the water surface at different angles and use the white
side of illustration board to see if the laser light is being transmitted through the water or air
interface.
6. You should be able to find a critical angle where, as the angle with the water surface decreases, all
of the light is reflected back into the clear glass and none is refracted out into the air.
7. Observe how laser light passes through the clear glass with water.
Question:
1. What happen when laser light crosses over from water to air?
2. How does laser light reflect and refract on clear glass with water?
Conclusion
Based on the activity, how total interval reflection occurs in the clear glass with water.
Activity about dispersion of light:
VIBGYOR
Objective:
1. To be able to determine dispersion and spectrum.
2. To be able to distinguish how dispersion of light occurs.

6. Material:
- Old CD
- Flashlight
Procedure:
1. Take the CD near to the light of flashlight.
2. Adjust until you get the seven color of dispersed.
3. Observe when light falls on CD and also observe its spectrum released.
Question:
1. How dispersal occurs into the CD?
2. When the CD near into the light of flashlight, does it produce spectrum? How?
Conclusion
Based on the activity, how dispersion and spectrum occurs when the CD is near to the light of flashlight.
GAUGE
A.
1. B
2. C
3. B
4. D
5. D
B.
1. A
2. C
3. B
4. A
5. D