The focal length of lens of refractive index `1.5` in air is `30 cm` When it is immersed in water of refractive index `(4)/(3)` ,then its focal length will be

The focal length of lens of refractive index 1.5 in air is 30cm When it is immersed in water of refractive index (4)/(3) ,then its focal length will be

A thin lens of refractive index 1.5 has focal length of 15 cm in air. When the lens is placed is a medium of refractive index (4)/(3), its focal length will become …..cm.

A convex lens of focal length 0.24 m and of refractive index 1.5 is completely immersed in water of refractive index 1.33. Find the change in focal length of the lens.

A convex lens of focal length 20 cm made of glass of refractive index 1.5 is immersed in water having refractive index 1.33 . The change in the focal length of lens is

Focal length of a convex lens of refractive index 1.5 is 2 cm. Focal length of lens when immersed in a liquid of refractive index 1.25 will be

A lens is made of flint glass (refractive index =1.5 ). When the lens is immersed in a liquid of refractive index 1.25 , the focal length:

A convex lens made of a glass of refractive index 3//2 has a focal length 'f' in air. If it is immersed into water of refractive index 4//3 , then with calculation, predict the new focal length of the lens inside water.