Question

An object is placed in front of a concave mirror and
it produces a real image of magnification 1.5. If the
object distance is decreased by 5 cm, the magnifi-
cation of the real image is increased to 4. Find the
focal length of the concave mirror.

PLEASE Explain The Answer Also.....​

Answer 1

Magnification = -vu where, v = image distance and u = object di. ... The focal length of the mirror is. A . 15 c m 15\ cm 15 cm. B .take care