Question

Concave mirrors are used in solar devices

Answer 1

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$\Large \bold \red{Question}\rightarrow$

Give reason :

Concave mirrors are used in solar devices.

$\Large\bold\red {Reason:}\Rightarrow$

(1) When rays of light coming from a distant object or source such as the sun and parallel to the principal axis are incident on a concave mirror, after reflection, they converge to a single point (focus). Thus, a concave mirror is a focusing mirror.

(2) This results in concentration of heat of the sunlight at that point. Hence, concave mirrors are used in solar devices.

For the same reason, if the image of the sun is obtained on a paper, using a concave mirror, the paper burns.

Answer 2

(1) When rays of light coming from a distant object or source such as the sun and parallel to the principal axis are incident on a concave mirror, after reflection, they converge to a single point (focus). Thus, a concave mirror is a focusing mirror.

(2) This results in concentration of heat of the sunlight at that point. Hence, concave mirrors are used in solar devices.

For the same reason, if the image of the sun is obtained on a paper, using a concave mirror, the paper burns.