Question

An optical device has been given to a student and he determines its focal length by focusing the imAge of a Sun on a screen placed 24 cm from the device on the same side of the sun

Answer 1

Answer:

The answer is  option three that is the concave mirror of focal length 24.

A concave mirror is a design with a reflecting surface at one turn which is covered on either inner or inner side. I

t is also known as a circulation mirror because this reflective surface combines the light incident on its surface and reflects the parallel rays of light towards a normal focus.

It is made from a circular interior that is quieter on the inside. In this Knowledge article, we become familiar with some of the uses of a concave mirror.