(a) Water is opitcally ______ than air.
(b) Air is optically ______ than glass.
(c) When a ray of light travels from water to air, it bends _____________ the normal.
(d) When a ray of light travels from air to glass, it bends ___________ the normal.
(e) When white light passes through a prism, it __________.
(f) The splitting of white light into its constituent colours is called ____________.
(g) A _________ mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.
(h) Radius of curvature of a spherical mirror is _________ its focal length.
(i) The angle of incidence for a ray of light passing through the centre of curvature of a spherical mirror is __
(j) A _________ mirror always forms a virtual image.
(k) A concave mirror forms a virtual image for an object placed _______________________.