Consider the superposition of \( \mathrm{N} \) harmonic waves of equal amplitude and frequency. ...

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Consider the superposition of \( \mathrm{N} \) harmonic waves of equal amplitude and frequency. If \( \mathrm{N} \) is a very large number determine the resultant intensity in terms of the intensity \( \left(\mathrm{I}_{0}\right) \) of each component wave for the conditions when the component waves have identical phases.
(A) NI०
(B) \( \mathrm{N}^{2} \mathrm{I}_{0} \)
(C) \( \sqrt{N} I_{0} \)
(D) \( \mathrm{I}_{0} \)
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