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.

a) An object is kept between centre of curvature and principal focus o

1.	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.
Answer» Solution :(a) Real and INVERTED (B) The distance between the pole and the principal focus of a convex MIRROR is called the focal length of a convex mirror. The relationship between focal length and radius of curvature of a convex mirror. The radius of curvature is FOUND to be equal to twice the focal length. R=2f This implies that the principal focus of a spherical mirror lies midway between the pole and centre of curvature.