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The graph, shown in the adjacent diagram...

The graph, shown in the adjacent diagram, represents the variation of temperature (T) of two bodies, x and y having same surface area, with time (t) due to the emission of radiation. Find the correct relation between the emissivity and absorptivity power of the two bodies

A

`E_xgtE_y&a_xlta_y`

B

`E_xltE_y&a_xgta_y`

C

`E_xgtE_y&a_xgta_y`

D

`E_xltE_y&a_xlta_y`

Text Solution

Verified by Experts

The correct Answer is:
C
(c) The graph shows that for the same temperature
difference `(T_2-T_1),` less time is taken for x. This means
the emissivity is more for x. According to Krichoff's
law, a good emitter is a good absorber as well.
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