Question

4. Which one of the following materials cannot be used to make a lens?
A) Water
B) Glass
C) Plastic
D) Clay
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Answer 1

Answer: (4) Clay

EXPLANATION-;

Glass and water are transparent materials. There is a certain amount of plastic that is transparent so that the plastic can be used to make a lens, but the clay is an opaque substance so that the light can not be transmitted into it and the clay can not be used to create the lens.

Answer 2

Clay

the clay is an opaque substance so that the light can not be transmitted into it and the clay can not be used to create the lens.

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