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The mass of a photon with a wavelength equal to 1.54 x 10 -8 cm is:
(1) 0.8268 x 10 -34 kg
(2) 1.287 x10 -33 kg
(3)1.4285x 10 -32kg
(4) 1.8884 x 10 -32 kg
ans: 1.4285x 10 -32
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