What is the energy of a 500 nm photon and electron in quantum physics?

[musicmar]

Homework Statement

Calculate the energy (in eV) of a 500 nm photon. Calculate the non-relativistic kinetic energy for a 500 nm electron.

The Attempt at a Solution

E_ph=hf=hc/λ = (6.63E-34 J·s)(3E8)/(500E-9 m) = 3.98E-19 J = 2.49 eV

I'm not sure why, but I thought that the energy of the electron would be the energy of the photon/c. However, that doesn't really make sense, nor does it yield the correct answer. The answer is 6.02E-6 eV. Any help on how I would find this would be appreciated.
Thank you.

 

[kuruman]

Can you find the momentum of a 500 nm electron?

 

[musicmar]

p = h/λ
= (6.63E-34 J·s)/(500E-9m)
= 1.3eE-27 J·m·s

p = mv
v = 1455.5 m/s
K = 1/2(mv²)= 9.65E-25 J
= 6.03E-6 eV

Thank you. This should have been obvious.