A convex glass lens of focal length 20 cm and refractive index 1.5 is immersed in water of R.I. `4//3`. What is the change in its focal length ?

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

A convex lens focal lenghts 30 cm made of glass of refractive index 1.5 is immersed in water having refrctive 1.33 . The change in the focal length of lens is

A convex lens focal lenghts 30 cm made of glass of refractive index 1.5 is immersed in water having refrctive 1.33 . The change in the focal length of lens is

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 and made of glass (mu = 1.5) is immersed in water of mu = 1.33 Calculate 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

Convex lens of focal length f made of glass of R.I. 1.5 is immered in water if R.I 4//3 focal length is

A convergent lens of focal length 20cm and made of a material with refractive index 1.1 is immersed in water. The lens will behave as a

A convex lens of glass (n=(3)/(2)) has a focal length 20 cm. The lens is immersed in water of refractive index (4)/(3) . What is the change in the power of convex lens ?