Questions
If energy of a photon is 12 eV, its linear momentum is
a
4.2 x 10-26 kg-m/s
b
6.4 x 10-27 kg-m/s
c
10-22 kg-m/s
d
2 x 10-20 kg-m/s
detailed solution
Correct option is B
If E be the total energy of a particle and E0 be the rest mass energy, then E2=E02+(pc)2For photon E0=0∴E2=0+(pc)2⇒p=Ec=12 x 1.6 x 10-193 x 108 kg-m/s⇒p=6.4 x 10-27 kg-m/sTalk to our academic expert!
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