Question

Pl help with answer of q21...

Answer 1

Answer:

Hey mate

your answer is as follows

A lens transmittical optical device. It is based on natural phenomena.

The images will be larger in size than the object.

They are real and virtual.

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Answer 2

Answer:

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Ans:1 Refraction of light.

Ans:2 A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.

Ans:3 Real and virtual image.

Ans:4 Behind the mirror.

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