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 emission of radiation. Find the correct relation between the emissive and adsoptive powers of the two bodies :

Options

A. `E_(x)gtE_(y)` and `a_(y)lta_(y)`
B. `E_(x)ltE_(y)` and `a_(x)gta_(y)`
C. `E_(x)gtE_(y)` and `a_(x)gta_(y)`
D. `E_(x)ltE_(y)` and `a_(x)lta_(y)`

Answer

C

Explanation

From graph `((dT)/(dt))_(x)gt((dT)/(dt))_(y)rArrE_(x)gtE_(y)`.
According to Kirchhoff.s law good emitters are good absorbers `:.a_(x)gta_(y)`.
`:.` Coorect choice is (c ).