CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 209 - 211 of 463

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Question number: 209

» Thermodynamic and Statistical Physics » Blackbody Radiation

Appeared in Year: 2011

MCQ▾

Question

A cavity contains blackbody radiation in equilibrium at temperature T. The specific heat per unit volume of the photon gas in the cavity is of the form Equation , where Equation is a constant. The cavity is expanded to twice its original volume and then allowed to equilibrate at the same temperature T. The new internal energy per unit volume is – (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 210

» Quantum Mechanics » Spin-Statistics Connection

Appeared in Year: 2014

MCQ▾

Question

Let, Equation where Equation are the Pauli matrices. If Equation and Equation are two arbitrary constant vectors in three dimensions, the commutator Equation is equal to (in the following I is the identity matrix). (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 211

» Classical Mechanics » Two Body Collisions » Scattering in Laboratory

Appeared in Year: 2014

MCQ▾

Question

In deep inelastic scattering electrons are scattered off protons to determine if a proton has any internal structure. The energy of the electron for this must be at least (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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