Define focal length of concave mirror.

An object is kept at a distance of 0.3 m from a concave mirror. If magnification is (1)/(2) , then determine the focal length of the concave mirror.

What will be the change in focal length f of a concave mirror when immersed in a liquid of refractive index n?

What will be the change in focal length f of a concave mirror when immerged in a liquid of refractive index n?

A concave mirror of focal length f (in air) is immersed in water (mu = (4)/(3)) . The focal length of the concave mirror in water will be

The focal length of a concave mirror in vacum is 2 m. What will be the focal length of the concave mirror in a medium of refractive index 2.76?

If the focal length of a concave mirror be 15cm then what is its radius of curvature?

The focal length of a concave mirror is f. A point object is placed at a distance of xf on the right side of the focus. The magnification of the image will be

The focal length of a concave mirror is 20 cm . Where should an object be placed to get an image magnified twice?