Question

radius of curvature of a concave mirror is 25 cm . what is its focal length.

Answer 1

Answer:

Explanation:

given

R= 25cm

f= ?

f= R/ 2

f= 25/ 2

f= 12.5cm

Answer 2

$<marquee behavior=alternate><font color=red><bgcolor=white>Focal length is -12.5cm$