Q1 of 13 Page 127

Answer the following questions.

Why are concave mirrors used in solar devices?

Concave Mirrors are used in the solar devices like Solar Cooker, Solar Furnace etc. because they are the only mirror which reflects the light towards the focus (Plane mirrors don’t have focus, convex mirrors have imaginary focus behind the mirror which reflects light away from the focus ).

The light collected at the Focus has lot of thermal energy which can be used in many ways.


More from this chapter

All 13 →
1

Answer the following questions.

Explain the difference between a plane mirror, a concave mirror and a convex mirror with respect to the type and size of the images produced.

 1

Answer the following questions.

Describe the positions of the source of light with respect to a concave mirror in


1. Torch light .


2. Projector lamp.


3. Floodlight.

 1

Answer the following questions.

Why are the mirrors fitted on the outside of cars convex?

 1

Answer the following questions.

Why does obtaining the image of the sun on a paper with the help of a concave mirror burn the paper?