Question

A 16 cm long stick is kept in front of a concave mirror having a focal length 10cm at a distance of 30 cm. find the image distance​

Answer 1

Answer:

Explanation:

1/v+1/u=1/f (mirror formula)

v=unknown

u=30

f=10

by mirror convention rules

u=-30

=>  1/10=1/v-1/30

=>  1/10+1/30=1/v

=>  3/30 + 1/30 = 1/v

=>  4/30 = 1/v

=>  2/15=1/v

=>  v=7.5cm