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Multiple Choice Question & Answer

YB WEB DESK. Dated: 11/23/2021 12:37:59 PM

Physics MCQ Questions and Answers
1Which
of the following are smallest known Lasers?
(A) Diode Laser
(B) Excimer Laser
(C) Argon Laser
(D) HeliumNeon
Laser
2_______
Laser has extensive industrial use.
(A) HeNe
Laser
(B) Solid Laser
(C) Nd:YAG Laser
(D) Crypton Laser
3The
light from a laser source is monochromatic
because all the photons
(A) are in Phase
(B) have same Energy
(C) have same Amplitude
(D) Are in the same Direction
4Principle
of laser is
(A) Spontaneous absorption
(B) Simulated emission
(C) Induced emission
(D) both (B) and (C)
5Two
lightsources
are said to be coherent if
(A) they vibrate in same Phase
(B) they vibrate with constant Phase difference
(C) (A) or (B)
(D) (A) and (B)
6Laser
beam is made a of
(A) Electrons
(B) Highly coherent photons
(C) Elastic particles
(D) Excited atoms
7A
hologram records _______of light
(A) Intensity
(B) Frequency
(C) Intensity and Phase
(D) Frequency and Phase
8Radiations
emitted by radioactive substances is
(A) Alpha
(B) Beta
(C) Gamma
(D) All of the above
9The
combination of protons and neutrons in a nucleus
is called
(A) Nucleolus
(B) Nucleons
(C) Nuclides
(D) Neutrinos
10Radioactive
emissions that are more harmful to
human body is
(A) Alpha particles
(B) Beta particles
(C) Gamma radiations
(D) Neutrons
11Halflife
in a radioactive decay is
(A) The time required for the material to decay completely
(B) The time required for the material to decay to half its
original volume
(C) The time required for the material to decay to half its
original mass
(D) Half time required for the material to decay completely
12Wave
number is directly related to
(A) Wavelength
(B) Energy
(C) Frequency
(D) Intensity
ANSWERS:
1(
A), 2(
C), 3(
B), 4(
D), 5(
C), 6(
B), 7(
C), 8(
D), 9(
B),
10(
C), 11(
C), 12(
C)