| Onsite Copy |

 

 

 

C) Photon, particle Collision

 

 

'Compton Effect'

(2nd proof of photon theory)

 

- Light act like particles
in collisions with free electrons.

;

x_ray_compton_scattering.avi

Penn State

 

 

High frequency source
(like X-Rays) 

Photon (after)

 

 

 

 

Photon transferred energy & momentum
 to electron

 

 

Photon Particle Collisions
Science Joywagon

 

 


Photon's

energy  & momentum

 
 decrease
  
=

Electron's
 energy & momentum
 increase.

 

 

 

 

 

 

Momentum photon
= p = h/λ

 

 

 

 

 

 

Which color of light has the
greatest momentum?

 

 

Violet

Highest f,  Smallest λ

 

 

 

 

**Mass, energy, momentum is conserved.