Atomic & Molecular Physics (CSIR Physical Sciences): Questions 1 - 3 of 18

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Question number: 1

» Atomic & Molecular Physics » Width of Spectrum Lines

Appeared in Year: 2013

MCQ▾

Question

Two monochromatic source, L1andL2 , emit light at 600 and 700 nm, respectively. If their frequency bandwidths are 101 and 103 GHz, respectively, then the ratio of line width of L1 to L2 is approximately – (December)

Choices

Choice (4) Response

a.

100:1

b.

1:75

c.

75:1

d.

1:85

Question number: 2

» Atomic & Molecular Physics » Diatomic Molecules » Vibrational

Appeared in Year: 2014

MCQ▾

Question

If the leading anharmonic correction to the energy of the energy of nth vibrational level of a diatomic molecule is xe(n+12)2ω with xe=0.001 , the total number of energy levels possible is approximately, (December)

Choices

Choice (4) Response

a.

1000

b.

250

c.

500

d.

750

Question number: 3

» Atomic & Molecular Physics » Relativistic Corrections for Energy Levels of Hydrogen Atom

Appeared in Year: 2011

MCQ▾

Question

The energy levels of the non –relativistic electron in a hydrogen atom i. e. , in a Coulomb potential V(r)1r are given by Enlm1n2 , where, n is principal quantum number, and the corresponding wave functions are given by ψnlm , where l is the orbital angular momentum quantum number and m is the magnetic quantum number. The spin of the electron is not considered. Which of the following is a correct statement? - (June)

Choices

Choice (4) Response

a.

Enlm does not depend on l and m for the Coulomb potential

b.

There are l(l+1) different wave function ψnlm for each Enlm

c.

There is a unique wave function ψnlm and Enlm

d.

There are exactly (2l+1) different wave function ψnlm , for each Enlm

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