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Question

(a) What type of lens is shown in the diagram on the right ? What will happen to the parallel rays of light ? Show by completing the ray diagram. (b) Your eye contains a convex lens. Why is it unwise to look at the sun ?


Solution

a) lens is covex lens,these rays wil meet at the focus after refraction
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b)-Focused sunlight is very strong, and can set fire to paper, as well as destroying your vision if you were so foolish as to look at the sun through a convex lens. Even without the use of a lens, it is not safe to look directly at the sun.

Its because convex lens make all the light passing through it to come at a specific point and the temperature of that point will be very high.So,if we look at the sun through convex lens our eyes will get damaged.

 

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