Question

For a black body radiation, if $v_m$ is the frequency corresponding to the maximum emission radiation at temperature T, the graph between $v_m$ and T is

• A. A
• B. B
• C. C
• D. D

Answer 1

Answer: (A)

A

According to Wein's displacement law:
$\lambda T=b$
For any type of electromagnetic radiations.
$\lambda \nu =c$
$\lambda =\frac{c}{\nu }$
i.e.
$\lambda T=b$
$\frac{c}{\nu }T=b$
$T=\frac{b}{c}\nu$
This is the equation for a straight line passing through the origin.
Option A is correct.