Question

Statement 1 : Radiations of longer wavelengths are predominant at lower temperature.
Statement 2 : The wavelength corresponding to maximum emission of radiations shifts from longer wavelength to shorter wavelength as the temperature increases.

• A. Statement 1 is true, statement 2 is false
• B. Statement 1 is false, statement 2 is true
• C. Both Statement 1 and statement 2 are true
• D. Both Statement 1 and statement 2 are false

Answer 1

The correct option is C Both Statement 1 and statement 2 are true

According to Wien's Displacement Law:
${\lambda }_{m}T=b=$constant
$\Rightarrow {\lambda }_m\alpha \frac{1}{T}$



From the above distribution, we can infer that, as the temperature increases, peak wavelength decreases. Therefore, radiations of longer wavelength are predominant at lower temperature.