PDF chapter test TRY NOW
- Take a convex lens or magnifying glass.
- Put it in the path of sunrays.
- Place a sheet of paper.
- Adjust the distance between the lens and the paper till you get a bright spot on the paper.
- Hold the lens and the paper in this position for a few minutes.
Does the paper begin to burn?
due to the light rays of the Sun.
Now replace the convex lens with a concave lens. Do you see a bright spot on the paper this time, too? Why are you not getting a bright spot this time?
, a bright spot in a manner is formed on the sheet due to nature of the lens.
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