CSIR Physical Sciences: Questions 190 - 192 of 401

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Question number: 190

» 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

Question number: 191

» Classical Mechanics » Central Force Motions

Appeared in Year: 2011

MCQ▾

Question

Two particles of identical mass move in circular orbits under a central potential V(r)=12kr2 . Let l1 and l2 be the angular momenta and r1,r2 be the radii of the orbits respectively. If l1l2=2 , the value of r1r2 is: (December)

Choices

Choice (4) Response

a.

2

b.

12

c.

2

d.

12

Question number: 192

» Atomic & Molecular Physics » Zeeman, Paschen-Bach & Stark Effects

Appeared in Year: 2014

MCQ▾

Question

An atomic transition 1P 1S in a magnetic field 1 Tesla shows Zeeman splitting. Given that the Bohr magneton μB=9.27×1024JT , and the wavelength corresponding to the transition is 250 nm, the separation in the Zeeman spectral lines is approximately, (December)

Choices

Choice (4) Response

a.

0.001 nm

b.

10 nm

c.

1.0 nm

d.

0.1 nm

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