Assertion : If the temperature of a star is doubled then the rate loss of heat from it becomes `16` times.
Reason : Specific heat varies with temperature.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If the assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

C

Explanation

From Stefa's law
`E = sigmaT^(4)`
or `E prop T^(4)`
`:. (E_1)/(E_2) = ((T_1)/(T_2))^(4) = ((T)/(2T))^(4)`
or `(E_1)/(E_2) = 1/16`
or `E_(2) = 16 E_(1) = 16` times.
Now , specific heat does not very with temperature, it is the thermal property of a material .