Question

An object forms 3 times magnified real image of object placed at 8 cm in front of its where is the image located​

Answer 1

Answer:

Here M= 3

u= -8 cm as u(object distance) is always -ve

M= -v/u

3= -v/-8

3=v/8

v(position of image)= 24cm

The image is formed in front of the mirror.

1/f= 1/u+1/v

1/f= 1/-8+ 1/24

1/f= 1/24-1/8

1/f=1/24-3/24

1/f= -2/24= -1/12

∴f= -12cm