Science 2 - Light sources

1. Light

2. Observe L.B page 38
How many light
sources can you see
in the picture?

3. Where does light come from?
Our major
light source:
the Sun

4. The sun is a very bright source
of light.
You must never look directly at
the sun because the bright light
can damage your eyes.

5. Light also comes from other
sources, which are not so
bright.
Everything we see reflects
light, but not everything is a
reflector.

6. Light also comes from other
sources, which are not so bright.
Examples: candles, flashlights,
room lights, table lamps all give out
light.

7. Where else does light come from?

10. Sorting light sources
Natural vs. Man-made (artificial)

11. Are these light sources?
moon
water
mirror
These items are not light sources, instead they
are reflecting light from other sources.

12. Can you name a light source?
Can you name a light reflector?

14. Natural Sources Artificial Sources
sunlight
storm light
flash light
studio lighting
flourescent / lamp

16. Science Activity: Which of these candles gives the
brightest light?

17. Answer
Activity book
page 21

18. Darkness

19. Ask learners to cover their eyes with their hands. Ask
them to describe what they can see. Typical responses
might include that
it is a bit dark or that they can see light coming in the
gaps. Explain that to make it completely dark we have to
block out all the light. Discuss the picture on page 40 of
the Learner’s Book. Talk about how there is often some
light in a bedroom at night –
from street lights or from light sources such as digital
alarm clocks or standby lights on electrical items.