Question

Solve this:
Q.72. A concave mirror of focal length 30 cm in air is immersed in water $\left[\mu =\frac{4}{3}\right]$. The focal length of the mirror in water will be
(1) 12 cm
(2) 30 cm
(3) 24.5 cm
(4) 16 cm

Answer 1

Dear Student ,
As after immersing the mirror in water the focal length does not change so the focal length remains same .
So here the focal length of the mirror in water will be 30 cm .
Regards