Quantum Mechanics-Elementary Theory of Scattering (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 1 - 5 of 6

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Question number: 1

» Quantum Mechanics » Elementary Theory of Scattering » Phase Shifts

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Appeared in Year: 2014

MCQ▾

Question

A double slit interference experiment uses a laser emitting light of two adjacent frequencies and . The minimum path difference between the interfering beams for which the interference pattern disappears is – (June -2014)

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 2

» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation

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Appeared in Year: 2013

MCQ▾

Question

In the Born approximation, the scattering amplitude for the Yukawa potential,

Is given by, (in the following ) (June)

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 3

» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation

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Appeared in Year: 2014

MCQ▾

Question

The scattering amplitude for the potential ; where and are positive constants, is given, in the Born approximation, by (in the following and ) – (June – 2014)

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 4

» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation

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Appeared in Year: 2014

MCQ▾

Question

An electron is in the ground state of a hydrogen atom. The probability that it is within the Bohr radius is approximately equal to – (June – 2014)

Choices

Choice (4)Response

a.

0.32

b.

0.60

c.

0.16

d.

0.90

Question number: 5

» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation

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Appeared in Year: 2012

MCQ▾

Question

A free particle describe by a plane wave and moving in the positive z – direction undergoes scattering by a potential,

If is changed to , keeping R fixed, then the differential scattering cross- section, in the Born approximation, (June)

Choices

Choice (4)Response

a.

Decreases to half the original value

b.

Decreases to one fourth the original value

c.

Increases to four times the original value

d.

Increases to twice the original value

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