So why does the atmosphere block gamma rays but not UV rays?


by Jd0g33
Tags: atmosphere, block, gamma, rays
Jd0g33
Jd0g33 is offline
#1
Sep22-12, 11:49 AM
P: 266
Or light rays for that matter. Where does the window open in the atmosphere on the em spectrum, UV? Why is that?
Phys.Org News Partner Physics news on Phys.org
Physicists design quantum switches which can be activated by single photons
'Dressed' laser aimed at clouds may be key to inducing rain, lightning
Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser
SHISHKABOB
SHISHKABOB is offline
#2
Sep22-12, 12:46 PM
P: 615
it has to do with the how the various levels of energy in different frequencies interact with the various molecules in the atmosphere

for example, UV rays are mostly absorbed by the ozone layer http://en.wikipedia.org/wiki/Ozone_layer

infrared rays are apparently most absorbed by water vapor

visible light is apparently low enough energy to not excite oxygen, but too energetic to excite molecular vibrational frequencies of molecules in air.

http://en.wikipedia.org/wiki/Electro...27s_atmosphere



since the atmosphere is not the same everywhere, there are different places that absorb different kinds of EMR. But by the time you get to the surface, a lot of it has been absorbed.


Register to reply

Related Discussions
How does sun rays pass through the atmosphere layers? General Physics 3
Why are X-rays absorbed in the atmosphere. General Physics 1
Information on X-rays and Gamma Rays Nuclear Engineering 2
Gamma Rays Introductory Physics Homework 4
Nuclear explosion in space x-rays hit atmosphere. High Energy, Nuclear, Particle Physics 7