Physics Group - I (3110011) MCQs

MCQs of Lasers

Showing 1 to 10 out of 39 Questions
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1.
LASER is an acronym for
(a) Light amplified by spontaneous emission for radiation
(b) Light amplification by Stimulated Emission of Radiation
(c) Length assisted survey of region
(d) None of the above
Answer:

Option (b)

2.
Which of the following is not a characteristic of LASER?
(a) Monochromatic
(b) Divergent
(c) Coherent
(d) Intense
Answer:

Option (b)

3.
The first laser was
(a) Ruby laser
(b) Helium Neon laser
(c) Carbondioxide laser
(d) Nd:YAG laser
Answer:

Option (a)

4.
Which of the following is not a property of LASER?
(a) Directionality
(b) polychromatic
(c) Coherence
(d) High intensity
Answer:

Option (b)

5.
Which of the following is a unique property of laser?
(a) Directionality
(b) Speed
(c) wavelength
(d) Coherence
Answer:

Option (d)

6.
Two different light sources are sending light and spots from both beams on a screen is obtained. Which of the following is true?
(a) the broad and faint spot is a laser while the bright and narrow spot is an ordinary light.
(b) the broad and bright spot is a laser while the narrow and faint spot is an ordinary light
(c) the broad and low intensity spot is an ordinary light, the narrow and highly intense spot is a laser light
(d) Actually, both the spots will merge into each other and form an interference patterns.
Answer:

Option (c)

7.
The coherence of laser emission results in extremely
(a) high power
(b) low power
(c) less intensity
(d) high dispersion
Answer:

Option (a)

8.
When laser light is focused on a particular area for a long time, then that particular area alone will be heated.
(a) True
(b) False
(c) Can't say
(d) No change
Answer:

Option (a)

9.
Absolute monochromaticity is
(a) achievable
(b) easily achievable
(c) achieved in all cases
(d) difficult to achieve
Answer:

Option (d)

10.
When exposed to radiation having a stream of photons, the process that can take place between two discrete energy levels
(a) absorption
(b) spontaneous emission
(c) stimulated emission
(d) all of these
Answer:

Option (d)

Showing 1 to 10 out of 39 Questions
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