Optics

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Joined: 2 May 2008
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2 May 2008 22:42:43 IST
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why moon is not red while sun at evening and morning is red.
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why moon is not red while sun at evening and morning is red.


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Cool goIITian

Joined: 22 Apr 2007
Posts: 91
2 May 2008 22:51:23 IST
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the distance between sun and earth is large and the red light having least refractive index get least deviated while other components of light get deviated by large margin


the diatance between moon and earth is less and hence there is less scope of deviation of light


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Hot goIITian

Joined: 14 Apr 2008
Posts: 194
3 May 2008 00:18:11 IST
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scattering of red colour is the least in the sky.thus sun's red colour is not scatterd v. well . therefore the reddish appearance.


Cool goIITian

Joined: 22 Apr 2007
Posts: 91
3 May 2008 00:25:19 IST
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but wat abt the light from the moon even that should get scattered?

Aatish Pandit's Avatar

Blazing goIITian

Joined: 3 Feb 2007
Posts: 1200
3 May 2008 00:31:26 IST
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hey buddy,,,,,but u shud also know one more thing.......

moon does not emit its own light.........its partly absorbed from the sun and the remaining is REFLECTED........and in that process intensity also gets reduced.......

and the color change also happens for moon.....sometimes it looks a bit yellowish.....I think its because of the same reason due to which sun appears red.......

Cool goIITian

Joined: 22 Apr 2007
Posts: 91
3 May 2008 00:34:49 IST
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i know dude,


moon does not hav its own light that is y i wrote "light from the moon " otherwise i would hav written "moon's light"


Cool goIITian

Joined: 22 Apr 2007
Posts: 91
3 May 2008 00:38:56 IST
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so in my opinion due to the lesser distance between moon and earth, there is less scope of deviation of light hence u will observe moon in the colour ranging from red to yellow. while the distance between earth and the sun is large,hence there is more chance for deviation and u will observe it only as red (during sunset).




 


hope iam clear and correct




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