An X-ray photon of wavelength 0.010 nanometers strikes a helium nucleus and bounces straight back. If the helium nucleus was originally at rest calculate its velocity after interacting with the x-ray.

Question

homeworksucks · Answer

I'm getting an answer but apparently the answer is supposed to be 2*10^4 m/s versus what I'm getting

homeworksucks · Answer

@UnkleRhaukus

jlg030597 · Answer

Hey i know that homework sucks but please be careful about username choosing thats a very negative username

kainui · Answer

How are you getting your answer @Homeworksucks  ?

homeworksucks · Answer

I'm getting my answer by using p=h/lambda to find initial total momentum, then h/mc(1-cos theta) to find my final wavelength and then finding the momentum of the reflected photon using p=h/lamda again then using a vector diagram and subtracting initial from reflected photon momentum to find electron momentum then using p=mv to find velocity. m=9.11*10^-31kg for all of this