Question

Why are concave mirrors used in solar devices​

Answer 1

$\huge\bold\red{HELLO!}$

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 ).

$<marquee>❤Harsh❤</marquee>$