CS/B.Optm/SEM-2/BO-201/2013
2013
PHYSICAL OPTICS – II
Time Allotted: 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the
following : 10x1 = 10
i) Holography is an application field of
a) interference of light
b) diffraction of light
c) polarisation of light
d) refraction of light.
ii) Laser is a coherent source of light.
a) True
b) False.
iii) If the number of lines/cm of a grating increases, the
resolving power of the grating
a) increases b) decreases
c) remains constant d) becomes zero.
iv) In Fraunhoffer diffraction the incident wavefront is
a) Plane b) Elliptical
c) Circular d) None of these.
v) To demonstrate the phenomena of interference we
require
a) 2 sources which emit radiation of nearly same
frequency
b) 2 sources which emit radiation of same frequency
c) 2 sources which emit radiation of different
wavelengths
d) none of these.