About 1350 w/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun, which is 1.5 × 1011 m away. use this information to estimate the average power output of the sun.

To solve the problem it is necessary to address the concepts of power and intensity of a wave. The intensity of one is uniformly distributed over a distance, is proportional to power and inversely proportional to the square of the distance from the source.

Theoretically it is expressed as

Re-arrange for P,

Replacing with our values we have

Therefore the average power output of the sun is

a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be?

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waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.