GATE (Graduate Aptitude Test in Engineering) Physics: Questions 511 - 514 of 659

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Passage

An ensemble of quantum harmonic oscillators is kept at a finite temperature .

Question 511 (2 of 2 Based on Passage)

Appeared in Year: 2007

Question

MCQ▾

The partition function of a single oscillator with energy levels is given by –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 512

Appeared in Year: 2008

Question

MCQ▾

The coherence length of laser light is –

Choices

Choice (4)Response

a.

Inversely proportional to the length of the active lasing medium

b.

Inversely proportional to the width of the spectral line

c.

Directly proportional to the width of spectral line

d.

Directly proportional to the length of the active lasing medium

Question 513

Appeared in Year: 2007

Question

MCQ▾

The number of fundamental vibrational modes of molecule is –

Choices

Choice (4)Response

a.

three: 1 is Raman active and 2 are infrared active.

b.

four: 2 are Raman active and 2 are infrared active.

c.

three: 2 are Raman active and 1 is infrared active.

d.

four: 1 is Raman active and 3 are infrared active.

Question 514

Appeared in Year: 2008

Question

MCQ▾

Thermodynamic variables of a system can be volume , pressure , temperature , number of particle , internal energy and chemical potential etc. For a system to be specified by Micro canonical , Canonical and Grand Canonical ensembles, the parameters required for the respective ensembles are –

Choices

Choice (4)Response

a.

b.

c.

d.

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