Why do EM waves with a large wavelength like those in the red range (and radio waves) interact with particles less than those in the blue range?
That is the reason why the sky is blue, is that right?
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3You mean "wavelength" where you say "amplitude", right? – DanielSank Apr 10 '15 at 00:26
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1This is called Rayleigh scattering. – ACuriousMind Apr 10 '15 at 00:35
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yeah! wavelength, sorry. – Cássio Evaldt Apr 10 '15 at 01:45
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See also Why is the sky not purple? as the answers include some nice descriptions of the physics involved. – John Rennie Apr 10 '15 at 10:22