Question

calculate the mass number of photon which wavelength 3.6A​

Answer 1

$for \: dual \: nature \: of \: light \: wavelength \frac{h}{mc} \\ m \ = \frac{h}{lamda \times c} \\ \frac{6.626 \times {10}^{ - 34} }{3.6 \times {10}^{ - 10} \times 3.0 \times {10}^{8} } = 6.135 \times {10}^{ - 33}$

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