Atomic and Molecular Physics [GATE (Graduate Aptitude Test in Engineering) Physics]: Questions 41 - 43 of 58

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Question 41

Atomic and Molecular Physics
Population Inversion

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 42

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 43

Appeared in Year: 2007

Question

Match List-Ⅰ List-Ⅱ▾

Match the following

List-Ⅰ (Group I)List-Ⅱ (Group II)
(A)

Franck – Hertz experiment

(i)

Wave function of atoms

(B)

Franck – Condon principle

(ii)

Electronic excitation of molecules

(C)

Hartree – Fock method

(iii)

Spin angular momentum of atoms

(D)

Stern – Gerlach experiment

(iv)

Energy levels in atoms

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (ii)
  • (iv)
  • (iii)
  • (i)

b.

  • (i)
  • (iv)
  • (ii)
  • (iii)

c.

  • (iii)
  • (ii)
  • (iv)
  • (i)

d.

  • (iv)
  • (ii)
  • (i)
  • (iii)

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