why the mass of photon is 1.67x10^-27 X Question Anonymous 16 minutes later #For

Question

why the mass of photon is 1.67x10^-27

X Question Anonymous 16 minutes later #For an electron, we have -31 where, me mass of electron - 9.11x 10kg K -kinetic energy of electron 35 keV 56076 x 10-15 then, we get - /12 (9.1x 10-3 kg) (56076 x 10-5 p .102 x 10-44 kg-m2/s2 p -101 x 1022 kgm/s #For a photon, we have 27 where, me -mass of photon 167 x 101 kg K -kinetic energy of electron 35 keV - 56076 x 10-15 then, we get - /12 (167 x 10-27 kg) (56076 x 10-1 J P - V187 x 10-41 kg2m2/s42 p -432 x 1021 kgm/s

Explanation / Answer

Mass of 'PROTON' is in reality 1.67 x 10^-27 kg.

Please check the question. If it says proton, then the solution is alright. If it says 'PHOTON' then the second part is not correct.

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