A concave mirror and a convex lens have the same focal length in air. When they are submerged in glycerine, the focal length

A concave mirror and a convex lens are of the same focal length in air. When they are immersed in water

Assertion : A concave mirror and convex lens both have the same focal length in air. When they are submerged in water, they will have same focal length. Reason refractive index of water is smaller than be refractive index of air.

Assertion : A concave mirror and convex lens both have the same focal length in air. When they are submerged in water, they will have same focal length. Reason refractive index of water is smaller than be refractive index of air.

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 ......

When a thin convex lens is put in contact with a thin concave lens of the same focal length (f), then the resultant combination has focal length equal to

When a thin convex lens is put in contact with a thin concave lens of the same focal length (f), then the resultant combination has focal length equal to

One concave and one convex lens have same focal length. If they are kept in contact, combination behaves as .......