First slide

Radiation

Question

A black body at a high temperature T K radiates energy at the rate E watt /m²; when the temperature falls to (T/2) K the radiated energy will be:

Moderate

A

E/4
B

E/2
C

2E
D

E/16

Solution

E $α T^{4}$
$E^{'} = \frac{E}{16}$

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