A `10 mm` long awl pin is placed vertically in front of a concave mirror. A `5 mm` long image of the awl pin is formed at `30 cm` in front of the mirror. The focal length of this mirror is

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 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 in front of a concave mirror at a distance of 7.5 cm from it. If the real image is formed at a distance of 30 cm from the mirror, find the focal length of the mirror. What would be the focal length if the image is virtual.

An object is placed in front of a concave mirror at a distance of 7.5 cm from it. If the real image is formed at a distance of 30 cm from the mirror, find the focal length of the mirror. What would be the focal length if the image is virtual.

When an object is placed at 6 cm in front of a concave mirror, its virtual image is formed at 15 cm from the mirror. Find the focal length and radius of curvature of the mirror.

A small status has a height of 1cm and is placed in front of a spherical mirror. The image of the statue is inverted and is 0.5cm tall and located to 10cm in front of the mirror. Find the focal length and nature of the mirror.