The energy of a photon of wavelength \( \lambda \) : \( \mathrm{P} ...

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The energy of a photon of wavelength \( \lambda \) :
\( \mathrm{P} \)
(1) \( h c \)
(2) \( \lambda h \)
W
(3) \( h c / \lambda \)
(4) \( \lambda c / h \)
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