Question

How far should one held an
object from a concave mirror of
focal length 40 cm so as to get
a virtual image twice the size of
the object​

Answer 1

Explanation:

please Mark has brainliest answer (♥_♥)(❁´◡`❁)(♥_♥)(❁´◡`❁)(♥_♥)

Answer 2

Answer: 1/u + (1/-2u) = 1/40

1/u - 1/2u = 1/40

1/2u = 1/40

2u = 40

u = 20

Object should be 20 cm in front of mirror.

HOPE IT HELPS YOU

PLEASE MARK AS BRAINLIEST :)