複選題

Problem 20
Which of the following statements are CORRECT about energy quanta?
(A) Energy quanta of EM waves also carry momentum.
(B) Energy of crystal vibrations is continuous or discontinuous depending on the crystal temperature T.
(C) Crystal vibrations with high frequencies f>> kBT/ h carry many energy quanta (called phonons).
(D) Crystal vibrations with low frequencies f<< kBT/ h carry many energy quanta.
(E) None of the above.

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核心觀念 頻率為 $f$ 的振動模態,...
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