Editor
Editor
 Sep 18, 2022
0
From the theory of relativity, the momentum $\rho$ of the photon is expressed as:
Difficulty: Easy
A: 
$\frac{hc}{\lambda}$
B: 
$\frac{h}{\lambda}$
C: 
$\frac{hf}{c}$
D: 
Either b or c
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