Quantum Mechanics-Elementary Theory of Scattering (CSIR Physical Sciences): Questions 4 - 5 of 5

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Question number: 4

» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation

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.

0.90

c.

0.60

d.

0.16

Question number: 5

» Quantum Mechanics » Elementary Theory of Scattering » Born Approximation

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,

V(r)={0,if x a,if x >a

If V0 is changed to 2V0 , keeping R fixed, then the differential scattering cross- section, in the Born approximation, (June)

Choices

Choice (4) Response

a.

Increases to twice the original value

b.

Decreases to one fourth the original value

c.

Increases to four times the original value

d.

Decreases to half the original value

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