Atomic and Molecular Physics [GATE (Graduate Aptitude Test in Engineering) Physics]: Questions 37 - 40 of 58

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Question 37

Atomic and Molecular Physics

Appeared in Year: 2008

Question

MCQ▾

A pure rotational Raman spectrum of a linear diatomic molecule is recorded using electromagnetic radiation of frequency . The frequencies of two consecutive Stokes lines are –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 38

Appeared in Year: 2008

Question

MCQ▾

When the refractive index of the active medium changes by in a laser resonator of length , the change in the spectral spacing between the longitudinal modes of the laser is ( is the speed of light in free space) –

Choices

Choice (4)Response

a.

b.

Zero

c.

d.

Question 39

Appeared in Year: 2008

Question

MCQ▾

Which one of the following statement is incorrect in vibrational spectroscopy with anharmonicity?

Choices

Choice (4)Response

a.

The frequency of hot band lines are smaller than the fundamental absorption

b.

Anharmonicity leads to multiple absorption lines.

c.

The intensity of hot band lines are stronger that the fundamental absorption.

d.

The selection rule for vibrational spectroscopy is

Question 40

Appeared in Year: 2007

Question

MCQ▾

In accordance with the selection rules for electric dipole transitions, the state of helium can decay by photon emission to the states –

Choices

Choice (4)Response

a.

b.

c.

d.

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