A convex mirror of focal length 'f' is placed at the origin with its reflecting surface towards the negative x-axis . Choose the correct graps between 'v' and 'u' for u`lt 0`.

Choose the correct relation between u, v and r for a spherical mirror:

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

A convex mirror has a focal length f. A real object is placed at a distance f in front of it from the pole produces an image at

An object is placed midway between a concave mirror of focal length f and a convex mirror of focal length f. The distance between the two mirrors is 6f. Trace the ray that is first incident on the concave mirror and then the convex mirror.

An object is placed in front of a concave mirror of focal length f as shown in figure. Choose the correct shape of the image.

A thin convex lens of focal length 30 cm is placed in front of a plane mirror. An object is placed at a distance x from the lens (not in between lens and mirror ) so that its final image coincides with itself. Then, the value of x is