Determine the solar constant for Mars if the distance to Mars is 1.5 AU. That is, and the luminosity of the Sun is 4 * 10 ^ 26 W.

decision
A = E / 4nr ^ 2; A = 4 * 10 ^ 26/4 * 3.14 * (2.25 * 10 ^ 11) ^ 2; A = 630 (W / m2).

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