A photon of frequency [tex] \nu [/tex] collides elastically with an electron at rest. The phton loses half its nergy in the collision an its final path makes a 60 degree angle with the original path. What is [tex] \nu [/tex] ? what sort of photon is this?(adsbygoogle = window.adsbygoogle || []).push({});

Well this is obviously the compton effect

[tex] \lambda_{1} - \lambda = \frac{h}{mc} (1 - Cos \phi ) = 1.21 * 10^12[/tex]

Then Also the photon lost half it's energy so

[tex] \frac{h \nu}{2} = \frac{h \nu '}{2} [/tex]

and figure that [tex] 2 \lambda = \lambda ' [/tex]

and then lambda = 1.21 * 10^12?

then [tex] \nu = 4.04 * 10^21 Hz [/tex]

which is a gamma ray?

am i right in this? i have my doubts about the lambdas

Also i have another thread i need some help would greatly appreciate with both! Thank you!!

https://www.physicsforums.com/showthread.php?t=51474

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# Homework Help: What sort of photon is this?

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