Page 1 - Wave Optics Work Sheet -3

Work Sheet -2 on Physics

Chapter -10, Class -12

Wave Optics ( INTERFERENCE OF LIGHT)

1. Does the value of polarising angle depend on the colour of light?
2. If the angle between the axis of polariser and the analyser is 45°, write
the ratio of the intensities of original light and the transmitted light after

passing through the analyser.
3. An unpolarised light of intensity I is passed through a polaroid. What is
the intensity of the light transmitted by the polaroid?
4. Plane of polarisation is _______ to plane of vibration.

5. Resolving power of an optical instrument is _______ to limit resolution.
6. Phenomenon of bending of light around comers of a small obstacle and

spreading into region of geometrical shadow is called _______ of light.
7. Consider the diffraction pattern for a small pinhole. As the size of the
hole is increased
(a) the size decreases.

(b) the intensity decreases.
(c) the size increases.
(d) the intensity decreases. [NCERT Exemplar]
8. The angular resolution of a 10 cm diameter telescope at a wavelength
of 5000 A is of the order of

(a) 10 rad
6
(b) 10 rad
-2
(c) 10 rad
-4
-6
(d) 10 rad
9. The angle of incidence at which reflected light is totally polarised for
reflection from air to glass (refractive index n) is

10. Resolving power of microscope depends upon
(a) wavelength of light used (directly proportional)
(b) wavelength of light used (inversely proportional)