Question

A beam of light is incident through the hole on
‘A’ and emerges out of the hole on the other
face of the box as shown in figure. Name the
device kept inside the box
​

Answer 1

Answer:

The device is concave lens as it diverges the incident light.

Answer 2

Hello...

Answer:

Convex lens

When this point light source is placed at the focus of convex lens then after falling on convex lens it will become parallel to the principal axis.

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