Which ones of the following principles can be used to explain the propagation of

Question

Which ones of the following principles can be used to explain the propagation of light? (A) Fermat's principle of least time (B) Hooke's law of elasticity (C) Pauli's exclusion principle (D) Heisenberg's uncertainty principle (E) Huygens' principle of wave Which ones of the following concepts must be applied to explain the features the Compton scattering effect? (A) quantization of the bound electron energy levels in atom (B) quantization of the electron spin (C) quantization of the energy of the electromagnetic field (D) quantization of the angular momentum of the electromagnetic field (E) quantization of the linear momentum of the electromagnetic field

Explanation / Answer

The propagation of light can be explained using

(a) Fermet's principle of least time

(e) Huygen's principle of wave

Although both the principles do talk about the propagation of light. It is the Huygens theory which is more relevant if we want a theory which expalin the propagation of light. "a plane light wave propagates through free space at the speed of light"

So if it just one answer please go for (E) if it is more than one option then (A) and (E)

(2)

Compton effect talks about the quantization of energy and momentum of electromagnetic field. While deriving the formula for wavelength shift also we quantize the energy and linear momentum before and after the scattering. So the most meaning ful options for this question are

(C) & (E)

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