Which one of the following materials cannot be used to make a lens?

(a) Water (b) Glass (c) Plastic (d) Clay

 

Answer

(d) Clay

 

Explanation

Since Clay is an opaque object, 

light cannot pass through it

 

Hence, it can not be used to make a lens.

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo