A poinit object `O` is placed in front of a glass rod having spherical end of radius of curvature `30cm`. The image would be formed at

An object is placed at a large distance in front of a concave mirror of radius of curvature 40 cm. The image will be formed in front of the mirror at a distance of :

An object is placed 40 cm in front of a convex mirror of radius of curvature 20 cm. The image

An object of height 5 cm is placed 2 m in front of a concave mirror of radius of curvature 40 cm. The size of image is

An object is placed 30 cm in front of a plano-convex lens with its spherical surface of radius of curvature 20 cm. If the refractive index of the material of the lens is 1.5, find the position and nature of the image formed.

An object is placed in front of a convex mirror of a radius of curvature 20 cm. Its image is formed 8 cm behind the mirror. The object distance is

An object 5 cm tall is placed 1 m from a concave spherical mirror which has a radius of curvature of 20 cm. The size of the image is