Question

why are concave mirror used in solar devices​

Answer 1

$\sf\underline{Reason:-}$

Concave mirrors are used in solar devices to collect heat and radiations.Heat radiations from the sun coming from infinity are brought to focus by concave mirror in its focal plane.

Answer 2

Answer:

concave mirrors are used in solar furnaces because they are converging mirrors , they makes(focuses) all light rays meet at one point.

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