|
|
|
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What color of light has the highest frequency? (Use you
reference table if you don't know)
|
showmethephysics.com
Google Slideshow
C) Photon, particle
Collision
'Compton Effect'
(2nd proof of photon theory)
- Light acts like particles
in collisions with free electrons.
School Blocks
YouTube? Use the file below.
x_ray_compton_scattering.avi
Penn State
| |
| High frequency source
(like X-Rays) |
|
Photon transferred
energy & momentum
to electron |
|
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
are conserved.
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Check Your Understanding
5 quick questions — pick an answer to see if you’re right.
1. The Compton effect shows that light acts like particles when it…
2. After an X-ray photon collides with an electron, the photon's energy and momentum…
3. Which color of visible light has photons with the greatest momentum?
4. Find the momentum of a photon with wavelength 6.63 × 10⁻⁷ m. (h = 6.63 × 10⁻³⁴ J·s)
5. In a photon–electron collision, which quantities are conserved?