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Q.

A black body radiates energy at the rate of E watt/m² at a high temperature TK when the temperature is reduced to $[\frac{T}{2}] K$ . Then radiant energy is

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a

$\frac{E}{4}$

b

$\frac{E}{2}$

c

$\frac{E}{16}$

d

2E

answer is D.

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Detailed Solution

$E = {σT}^{4} \Rightarrow \frac{E_{1}}{E_{2}} = {(\frac{T_{1}}{T_{2}})}^{4}$

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