Criado por Katie Lewis
mais de 10 anos atrás
|
||
Effect of global warming
Visible light from the sun passes through the atmosphere The Earth absorbs this energy then emits it as infra-red radiation Some of this infra-red makes it back into space The rest is absorbed by CO2,Methane gas and Water Vapour These gases then re-emit the infra-red back down to Earth This leads to global warming
Red Shift
Absorption lines are there because gases in the star absorb at certain wavelengths of light When we look at light from a distant galaxy the absorption lines are shifted to the red end The further away the galaxy the more the lines have shifted Galaxies are moving away because the universe is expanding Theory: Big Bang
The faster the light source moves the faster its light will be 'shifted'
Everything in the universe is moving away from a single point because light from different stars and from the edge of the universe also shows this 'red shift'
New Page
Quer criar suas próprias Notas gratuitas com a GoConqr? Saiba mais.