What other type of energy accompanies light from the sun?
Materials needed
- Two magnifying glasses
- One sheet of paper
- Glass bowl
Procedure
1. Ask your teacher where you should do this experiment. You will need to be in bright sunlight with no wind.
2. Put the paper in the bowl.
3. Hold the magnifying glass between the paper and the sun so a beam of light focuses on the paper.
4. Notice that as you move the magnifying glass closer to and farther from the paper, the point of light changes in size. Notice also that it gets brighter as it gets smaller.
5. Adjust the distance between the paper and the magnifying glass to make the point of light very small and bright.
2. Put the paper in the bowl.
3. Hold the magnifying glass between the paper and the sun so a beam of light focuses on the paper.
4. Notice that as you move the magnifying glass closer to and farther from the paper, the point of light changes in size. Notice also that it gets brighter as it gets smaller.
5. Adjust the distance between the paper and the magnifying glass to make the point of light very small and bright.
6. Pull the magnifying glass back about 1 cm (1/2 in). And watch the paper.
7. Do you see anything happening to the paper? If so what, and why do you think it is happening? What kind of energy is causing this to happen?
8. What do you might happen if you used two magnifying glasses focused on the same spot on the paper? Try it.
7. Do you see anything happening to the paper? If so what, and why do you think it is happening? What kind of energy is causing this to happen?
8. What do you might happen if you used two magnifying glasses focused on the same spot on the paper? Try it.
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