Question

A concave mirror forms a real image fours times as tall as object placed 10 cm in front of mirror. find the position of the image & the radius of curvature of the mirror.​

Answer 1

Explanation:

m=-4 ( real image is always negative)

u=-10

m=f/f-u

-4=f/f+10

so, f=-8cm

r=2f

so, r=16cm ( length can't be negative)

1/f=1/v+1/u

-1/8+1/10=1/v

v=-40cm