" concave mirror of focal length fin vacuum is placed in a medium of refractive index "2" .Its focal length in the medium is."

A concave mirror of focal length f in vacuum is placed in a medium of refractive index 2. its focal length in the medium is

Assertion : A concave mirror of focal length f in air is used in a medium of refractive index 2. Then the focal length of mirror in medium becomes double. Reason: The radius of curvature of a mirror is double of the focal length.

Assertion : The radius of curvature of a mirror is double of the focal length. Reason : A concave mirror of focal length f in air is used in a medium of refractive index 2. Then the focal length of mirror in medium becomes 2f.

Assertion : The radius of curvature of a mirror is double of the focal length. Reason : A concave mirror of focal length f in air is used in a medium of refractive index 2. Then the focal length of mirror in medium becomes 2f.

A convex lens of focal length .f is placed in a medium of refractive index equal to that of lens What happens to its focal length?

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.