Earth is about 150 million kilometers from the sun, and the apparent brightness of the sun in our sky is about 1300 watts/m2. use these two facts and the inverse square law for light to answer the questions.

various parts have been answered

Explanation:

Inverse square for light is

initial distance from sun to earth is

and intensity or apparent brightness of sun is

a)

If distance from sun to earth is

then apparent brightness is  

b)

If distance from sun to earth is  

then apparent brightness is  

c)

If distance from sun to earth is  

then apparent brightness is

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