First slide

Radiation

Question

The temperature of a body is increased from 27°C to 127°C.The radiation emitted by it increases by a factor of:

Moderate

A

(256/81)
B

(15/9)
C

(4/3)
D

(12/27)

Solution

$\frac{E_{2}}{E_{1}} = \frac{{T^{4}}_{2}}{{T_{1}}^{4}} = \frac{256}{81}$

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