Fill in the blanks (a) Water is optically........... than air.
Fill in the blanks
(a) Water is optically........... 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 colors 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 center of curvature of a spherical mirror is............
(j) A convex mirror always forms a virtual image.
(k) A........... ..mirror forms a virtual image for an object placed...........
1 Answers
(a) Water is optically denser than air.
(b) Air is optically rarer than glass.
(c) When a ray of light travels from water to air, it bends away from the normal.
(d) When a ray of light travels from air to glass, it bends towards the normal.
(e) When white light passes through a prism, it disperses
(f) The splitting of white light into its constituent colours is called dispersion.
(g) A concave 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 two times its focal length.
(i) The angle of incidence for a ray of light passing through the center of curvature of a spherical mirror is 0°
(j) A convex mirror always forms a virtual image.
(k) A concave mirror forms a virtual image for an object placed between pole and focus.