Asked by Anon

Calculate the wavelength of a proton with energy 2.45 eV.

Please some help!
Answered by DrBob222
2.45 eV = 3.92E-19 joules.
Then E = hc/wavelength.
E = joules
h = Planck's constant
solve for wavelength in meters.
Answered by Anon
Can you write the result because i found 5.067e-7 and it's wrong.I try it many time in diffrent ways baut I finished with the some result!
Answered by Anon
Finally I found it.We have to do this :

wavelength=h/P
P^2=2*m*E
P=sqrt(2*m*E)

E = joule
h = Planck's constant
m = kg
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