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Cool goIITian

Joined:	5 May 2008
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6 May 2008 10:59:51 IST

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606

GET SCREWED UP.READ ON

None

HOW MUCH BRIGHTER IS THE SUNLIGHT THAN THE MOON LIGHT?THE ALBEDO(REFLECTIVITY)OF THE MOON IS 0.07

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U ALREADY KNOW

Blazing goIITian

Joined: 16 Mar 2007

Posts: 838

6 May 2008 11:15:21 IST

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Stars have no albedo, because they give off their own light, and albedo is a measure of reflected light. Even with such a low albedo of 0.07 the moon's rocks still reflect a lot more sunlight than does the adjacent empty space. The Earth is thus capturing a flux of:

1400 * 0.07 * (pi * R^2) / (2 * pi * d^2)

Or roughly:

1400 * (1 / 1400000)

In other words, moonlight is 1400000 times fainter than sunlight.

Did u appear for NUAA ???..this was the question der ..qu no 5 . ...I think I am right abt this . I never miss a question on albedo flux .

sinha

Cool goIITian

Joined: 5 May 2008

Posts: 52

6 May 2008 11:29:44 IST

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IITIAN 2007 IHAVE JUST WORKED OUT THE ANSWER.IT COMES TO BE APPROXIMATELY(I USED A CLC.)1 MILLION TIMES SUN IS BRIGHTER THAN MOON.PLS CHECK THE DIFFERENCE OF 0.4 MILLION BCOZ IDONT HAVE THE SOLUTION

U ALREADY KNOW

Blazing goIITian

Joined: 16 Mar 2007

Posts: 838

6 May 2008 13:46:07 IST

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Yeah thats natural if use diifferent surface for flux consideration ..I have used w.r.t earth cuz I know the radius and mass of earth ..other data for other celestial objects ..I am not sure abt them .

sinha

Cool goIITian

Joined: 5 May 2008

Posts: 52

6 May 2008 14:52:03 IST

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good u r a genius man whats ur mail id

U ALREADY KNOW

Blazing goIITian

Joined: 16 Mar 2007

Posts: 838

7 May 2008 19:34:43 IST

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ken_hey56@yahoo.com

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