TNPSC Atomic Nuclear Physics Objective Questions Answers - 1

Question: 1

Laser stands for ____

(A) Light amplification by stimulated emission of radiation

(B) Light amplification by scattering of radiation

(C) Light accelerated by the emission of electron

(D) Light amplification by the emission of photon

Ans: A

Light amplification by stimulated emission of radiation

Question: 2

MASER stands for ____

(A) Microwave accelerated by the scattering of radiation

(B) Modulated amplified signal emitted by radiation

(C) Microwave amplification by stimulated emission of radiation

(D) Microwave amplification by spontaneous emission of radiation

Ans: C

Microwave amplification by stimulated emission of radiation

Question: 3

____ is the best light source for optical fiber communication.

(A) Neon vapour lamp

(B) He-ne laser

(C) Semiconductor laser

(D) Ruby laser

Ans: C

Semiconductor laser

Question: 4

Which of the following is a coherent source of light?

(A) Tungsten filament lamp

(B) Mercury vapour lamp

(C) Laser light

(D) Sodium vapour lamp

Ans: C

Laser light

Question: 5

The specific charge was determined by ____

(A) Goldstein

(B) Rutherford

(C) Chadwick

(D) J.J. Thomson

Ans: D

J.J. Thomson

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