Question

The energy of elastic waves is given by _____________

(a) nω

(b) n ħω

(c) nħω/2

(d) (n + ^1⁄2)ħω

Answer 1

Correct choice is (d) (n + ^1⁄2)ħω

Explanation: The energy of a lattice vibration is quantized which is given by the expression: E = (n + ½)ħω, where w is the angular frequency of the waves.