Thermodynamic and Statistical Physics (CSIR Physical Sciences): Questions 18 - 19 of 56

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Question number: 18

» Thermodynamic and Statistical Physics » Planck's Distribution Law

MCQ▾

Question

In low density oxygen gas at low temperature, only the translational and rotational modes of the molecules are excited. The specific heat per molecule of the gas is – (December)

Choices

Choice (4) Response

a.

52kB

b.

kB

c.

12kB

d.

32kB

Question number: 19

» Thermodynamic and Statistical Physics » Blackbody Radiation

Appeared in Year: 2014

MCQ▾

Question

Which of the graphs below gives the correct qualitative behavior of the energy density ET(α) of black body radiation of wavelength λ at two temperature T1 and T2(T1<T2) ? (June)

Choices

Choice (4) Response

a.

Energy density as a function of wavelength: Choice A

Energy Density as a Function of Wavelength: Choice A

In figure, the graph shows the qualitative behavior of the energy density of black body radiation of wavelength at two temperatures.

b.

Energy density as a function of wavelength: Choice B

Energy Density as a Function of Wavelength: Choice B

In figure, the graph shows the qualitative behavior of the energy density of black body radiation of wavelength at two temperatures.

c.

Energy density as a function of wavelength: Choice C

Energy Density as a Function of Wavelength: Choice C

In figure, the graph shows the qualitative behavior of the energy density of black body radiation of wavelength at two temperatures.

d.

Energy density as a function of wavelength: Choice D

Energy Density as a Function of Wavelength: Choice D

In figure, the graph shows the qualitative behavior of the energy density of black body radiation of wavelength at two temperatures.

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