Laser Quiz | Laser Objective Type Questions and Answers

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Questions
21 Directionality property of laser can be used in
A surveying
B remote sensing
C lidar
D All Correct

Answer: All Correct
22 Nd - YAG laser is a
A two level laser
B three level laser
C four level laser
D five level laser

Answer: four level laser
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23 In Nd-YAG laser, YAG means
A Yttrium Aluminium Garnet
B π‘Œ3𝐴�5𝑂12
C Yellow Aluminium Garnet
D Both A and B

Answer: Both A and B
24 The pumping source in Nd:YAG laser is
A chemical
B optical
C electrical
D mechanical

Answer: optical
25 The active medium in Nd:YAG laser is
A Nd
B YAG crystal
C Y
D AG

Answer: Nd
26 Example of solid state laser is
A He-Ne Laser
B 𝐢𝑂2 Laser
C Nd:YAG Laser
D Dye Laser

Answer: Nd:YAG Laser
27 He-Ne laser is a
A three level laser
B four level laser
C two level laser
D five level laser

Answer: four level laser
28 The pumping source in He-Ne laser
A optical
B electric discharge
C chemical
D mechancal

Answer: electric discharge
29 The ratio of He to Ne in He-Ne laser is
A 1:10
B 2:13
C 10:1
D 3:15

Answer: 10:1
30 The active medium in He-Ne laser is
A He
B Ne
C He-Ne
D All correct

Answer: Ne
31 The role of He in He-Ne laser is
A He is an active medium
B population inversion takes place in He
C Stimulated emission takes place in He
D He atoms help in exciting Ne atoms

Answer: He atoms help in exciting Ne atoms
32 The reason for narrow tube in He-Ne laser
A atomic collision with tube wall increases
B atomic collision with tube wall decreases
C there is no effect of narrow tube on He-Ne
D atomic collision with tube wall constant Laser

Answer: atomic collision with tube wall increases
33 The image produced by holography is
A 1-dimensional
B 2-dimensional
C 3-dimensional
D 4-dimensional

Answer: 3-dimensional
34 A hologram contains information of the object about
A amplitude only
B phase only
C amplitude and phase both
D neither amplitude nor phase

Answer: amplitude and phase both
35 Hologram is the result of
A Interference of object and reference beam
B polarization of object and reference beam
C diffraction of object and reference beam
D both polarization and diffraction of object and reference beam

Answer: Interference of object and reference beam
36 The information carrying capacity of a hologram is
A less than an ordinary photograph
B more than an ordinary photograph
C equal to an ordinary photograph
D All option correct

Answer: more than an ordinary photograph
37 each part of hologram contains information about
A entire object
B particular part of the object
C important part of the object
D front side of the object

Answer: entire object
38 Zener diode has
A constant breakdown voltage
B sharp break down voltage
C varying breakdown voltage
D None

Answer: sharp break down voltage
39 Population inversion in laser means
A number of atoms in ground state are more than number of atoms in excited state
B number of atoms in ground state are less than number of atoms in excited state
C number of atoms in ground state is equal to number of atoms in excited state
D none

Answer: number of atoms in ground state are less than number of atoms in excited state
40 Which is correct about laser
A monochromatic
B white
C bi-chromatic
D none

Answer: monochromatic

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