First slide

Radiation

Question

If the temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor

Easy

A

2
B

4
C

8
D

16

Solution

$Q_{1} \propto T^{4} and Q_{2} \propto (2 T)^{4} \frac{Q_{2}}{Q_{1}} = \frac{(2)^{4} T^{4}}{T^{4}} = 16$

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