What is the nature of the mirror having focal length - 15 cm?

An object is kept in front of a concave mirror of focal length 15 cm.The image formed is three times the size of the object.Calculate two possible distances of the object from the mirror.

What is the relation between focal length and radius of curvature of a concave mirror? What is focal length of a plane mirror?

Calculate the position of image, when an object is placed at a distance of 15 cm from a convex mirror having focal length 0.45 m.

A convex lens is in contact with concave lens .The magnitude of the ratio of their focal length is 2//3 .Their equivalent focal length is 30 cm.What are their individual focal lengths?

An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image

An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image

A concave mirror of focal length 20 cm and a convex mirror of focal length 15 cm are placed 50 cm apart,such that the two mirrors face each other .An object is placed exactly midway betwen them.Find teh nature and position of the image formed by reflection first at the concave mirror and then at the convex mirror.