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

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

Focal length of thin lens of refractive index 1.5 is 15 cm. When placed on liquid of refractive index 4/3 , then its focal length will be ...... cm.

The focal length of the lens of refractive index (mu = 1.5) in air is 10 cm. If air is replaced by water of mu = (4)/(3) , its focal length 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 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 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 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

A concave mirror and convex lens (both of refractive index 1.5) have focal length 3 cm in air. When they are placed in water ofrefractive index 4/3 , then their new focal lengths will be ......