Question

Question 1: Which one of the following materials cannot be used to make a lens...? (a) Water (b) Glass (c) Plastic (d) Clay.

Answer 1

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(d) Clay.

$\huge{ \boxed { \boxed { \underline{ \bf \orange {\mathbb {EXPLAINATION }}}}}}]$

• A lens allows light to pass through it.

• Since clay does not show such property, it cannot be used to make a lens.

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${ \underline{ \bf \green{FOLLOW\:ME}}}$

${ \underline{ \bf \blue{VISHU\:PANDAT}}}]$

Answer 2

Answer:(d) Clay.

Explanation:

Stock lenses and semi-finished lenses made of plastic are created in a casting process: special ingredients, such as for improving UV absorption, are added to the liquid materials called monomers. This mixture is poured into moulds, hardened and then processed to reduce residual stress.The most common lens material is, of course, optical glass, but crystals and plastics are frequently used, while mirrors can be made of essentially anything that is capable of being polished.

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