Using a certain concave mirror, the magnification is found to be 4 times as great when the object was 25 cm from the mirror as it was with the object at 40 cm from the mirror, the image, being real in each case.Find the focal length of the mirror.

For a concave mirror the magnificant of a real image was found to be twice as greater when the object was 15 cm from the mirror as it was when the object was 20 cm from the mirror. The focal length mirror is

For a concave mirror of focal length f, image is 2 times larger. Then the object distance from the mirror can be

The image of a distant object is formed at 30 cm from a concave mirror. What is the focal length of the mirror?

An object is placed at 20 cm from the pole of a concave mirror. It forms real image at a distance of 60 cm from the pole. Find the focal length of the concave mirror.

An object is placed at a distance of 30 cm from a concave mirror and its real image is formed at a distance of 30 cm from the mirror. The focal length of the mirror is

An object is placed at a distance of 25 cm from a spherical mirror, its image is formed behing the mirror at a distance of 5 cm. The focal length and type mirror is

In case of a concave mirror magnification is found to be m_(1) = -0.5 for a certain position of object and when object is displaced by 5 cm from this position then magnification is found to be m_(2) = -0.25 . What will be the focal length of the mirror?

A concave mirror gives a real image magnifies 4 times. When the object is moved 3 cm the magnification of the real image is 3 times. Find the focal length of mirror.