Define the principal focus of a concave mirror.

a) An object is kept between centre of curvature and principal focus of a concave mirror. Write the nature of the image formed. b) Define focal length of a convex mirror. Write the relationship between focal length and radius of curvature of a convex mirror.

An objected is placed at the principle focus of a convex mirror. The image will be at

Draw the ray diagram to construct an image when an object is placed between the principal focus and pole of a concave mirror.

An object is kept on the principal axis of a concave mirror of focal length 12 cm. If the object is at a distance of 18 cm from the mirror, calculate the image distance. Determine the nature of the image formed by calculating the magnification produced by the mirror.