The laser light is:
a) Monochromatic
b) colored
c) chromatic
d) none of these
Laser beam can be used to generate three dimensional image of an object in a process called……….
a) homograph
b) holography
c) demography
d) none of these
Laser used for communication is in the form of
a) heat
b) light
c) electricity
d) sound
What is the principle of fiber optical communication?
a) Frequency modulation
b) Population inversion
c) Total internal reflection
d) Doppler Effect
A cable of optical fiber consists of…….optical fibers.
a) 20
b) 30
c) 40
d) 50
Tele means………..
a) high
b) far
c) near
d) none of these
