Energy and momentum related to photon wavelength
An Xray photon has a wavelength of 3.3*10^10m. Calculate the momentum mass and energy of the particle associated with the photon, which moves with a velocity c.
I used p=h/(lambda) to find the momentum.
p=6.6*10^34/3.3*10^10=2.0*10^24 Ns answer is supposed to be 2.2*10^24Ns
Mass=p/c=2.0*10^24 Ns/3.0*10^8=6.7*10^33kg answer is supposed to be 6.2*10^33kg
E=mc^2=6.7*10^33*(3.9*10^8)^2=6*10^16J which is correct.
Can anyone tell me why the first two answers are wrong?
Thanks!
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