Showing posts with label photon dispersal. Show all posts
Showing posts with label photon dispersal. Show all posts

Friday, 21 January 2011

Why is it so

That when you look up into the sky in daylight you can see no further than the atmosphere? I know the sky is blue because of the scattering effect of the atmosphere on photons of light from the sun. However, when you see a still photo taken from above the Earth, on the moon for example or taken from an orbiting satellite there's a clear view of the planets surface? I guess a more structured question is why is there not scattering effect on the photons being bounced back into space from the Earth as they pass through the atmosphere a second time??

Unless maybe all of the photons in the blue wavelength are dispersed on their first trip and there's none left for the return journey?

Am I being really dim?