Question

Assertion :When temperature of a body is increased, in radiant energy, number of low wavelength photons get increased. Reason: According to Wien's displacement law ${\lambda }_m\propto \frac{1}{T}$

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

According to Wein's displacement law:
$\lambda T=b$ $\lambda =\frac{b}{T}$
Hence if we increase the temperature, the wavelength with maximum emitted radiation decreases.
Hence both assertion and reason are true and the assertion is the correct explanation for the reason.