A concave mirror of focal length '$f$' can form a magnified erect as well as inverted image of an object with respect to the mirror in each case. Draw the ray diagrams for the same.

Draw ray diagrams to show the formation of images when the object is placed in front of a concave mirror.

(i) between pole and focus point

(ii) between focus and centre of curvature

(iii) beyond centre of curvature.

Draw ray diagrams to show the formation of images when the object is placed in front of a convex mirror.

(i) at infinity

(ii) at any point between infinity and pole.

Why is the focal length of a convex mirror is positive?

The refractive index of diamond is $2.47$ and that of glass is $1.51$. How fast does light travel in glass as compared to diamond?