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Does the sun have a strong variable luminance or a weak variable luminance? explain your answer?

User Laander
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Answer:

The average luminance of the Sun is about 1.88 giga candela per square metre, but as viewed through Earth's atmosphere, this is lowered to about 1.44 Gcd/m2. However, the luminance is not constant across the disk of the Sun (limb darkening).

Step-by-step explanation:

User Arthur Kushman
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