Atomic and Molecular Physics (GATE Physics): Questions 1 - 2 of 22

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Question number: 1

» Atomic and Molecular Physics » X-Ray Spectra

Appeared in Year: 2014

MCQ▾

Question

The energy, εk for band electrons as a function of the wave vector, k in the first Brillouin zone (πakπa) of a one dimensional monatomic lattice is shown as ( a is lattice constant)

The energy as a function of the wave vector

The Energy as a Function of the Wave Vector

In figure the energy for band electrons as a function of the wave vector in the first Brillouin zone of a one dimensional monatomic lattice is shown as.

The variation of the group velocity vk is most appropriately represented by

Choices

Choice (4) Response

a.

The variation of the group velocity - Choice – A

The Variation of the Group Velocity - Choice – A

In figure the variation of the group velocity with respect to wavevector is shown.

b.

The variation of the group velocity - Choice – B

The Variation of the Group Velocity - Choice – B

In figure the variation of the group velocity with respect to wavevector is shown.

c.

The variation of the group velocity - Choice – C

The Variation of the Group Velocity - Choice – C

In figure the variation of the group velocity with respect to wavevector is shown

d.

The variation of the group velocity - Choice – D

The Variation of the Group Velocity - Choice – D

In figure the variation of the group velocity with respect to wavevector is shown

Question number: 2

» Atomic and Molecular Physics » Rotational and Vibration Spectra of Diatomic Molecules

Appeared in Year: 2014

MCQ▾

Question

The moment of inertia of a rigid diatomic molecule A is 6 times that of another rigid diatomic molecule B. If the rotational energies of the two molecules are equal, then the corresponding values of the rotational quantum numbers JAandJB are –

Choices

Choice (4) Response

a.

JA=2,JB=1

b.

JA=3,JB=1

c.

JA=5,JB=0

d.

JA=6,JB=1

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