Engineering Physics II: Quantum Mechanics Unit 1 Quiz
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Questions and Answers

What is the name of the law that explains the observed spectral distribution of a black body radiation?

Stefan-Boltzmann’s Law

Who first showed the energy density of radiation of wavelength λ and λ + dλ from a cavity (i.e. black body) of temperature T?

Wien

What is the main limitation of Wien's radiation formula?

It explains only the experimental results fairly well for low wavelength region

Which classical law of equipartition of energy was applied to the electromagnetic black body radiation by Rayleigh and Jean?

<p>Rayleigh-Jean's Law</p> Signup and view all the answers

What is the name of the law which states that the energy density of a black body radiation is inversely proportional to the fourth power of wavelength?

<p>Rayleigh-Jeans law</p> Signup and view all the answers

Who is known for his discovery of energy quanta and his role as the originator of quantum theory?

<p>Max Planck</p> Signup and view all the answers

What did the failure of the Rayleigh-Jeans formula indicate about classical physics?

<p>Inadequacy</p> Signup and view all the answers

According to classical theory of electromagnetic radiation, what should happen to an orbital electron due to its continuous loss of energy?

<p>Collapse with nucleus</p> Signup and view all the answers

Who explained the Rutherford model by the Old Quantum Theory of the atom?

<p>Bohr</p> Signup and view all the answers

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