I have no idea what I am doing wrong in that 3rd problem. I used the equation de

Question

I have no idea what I am doing wrong in that 3rd problem. I used the equation delta lambda = h/mc (1-cos(theta)) and solved for the scattered photon wavelength. Any ideas?

Thanks

In the Compton effect an X-ray photon scatters from a free electron. In such an experiment, an X-ray photon of wavelength 0.106 nm scatters at an angle of 45° from the incident direction. What is the momentum of the incident photon? Give your answer to at least three significant figures. Your answer must be accurate to 1%. 6.251008x10"24 kg m/s You are correct. Your receipt no. is 159-3411 Previous Tries What is the energy of the incident photon? Give your answer to at least three significant figures. Your answer must be accurate to 1%. 1.874005x1015 J You are correct. Previous Tries Your receipt no. is 159-39750 What is the wavelength of the scattered photon? Give your answer to at least five significant figures. Your answer must be accurate to 0.1%. 0.106072 nm Submit Answer Incorrect. Tries 6/10 Previous Tries

Explanation / Answer

You need to find the wavelength of scattered photon by cromton formula we know that shift in photon wavelength is given by

?f-?i=h/mpc(1-cos?)

Where the difference of intial wavelength and final wavelength is given by above formula and we need to find final wavelength in the question.

Hence difference is =2.426×10-12×(1-cos45)

=7.105×10-13m

=7.105×10-4nm

Hence scattered electron wavelength will be .106+7.105×10-4

Ans=.106710nm

Please do like and feel free to ask doubt

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