Question

The maximum energy in the thermal radiation from a hot source occurs at a wavelength of $11\times {10}^{-5}$ cm. According to Wein's law, the temperature of the source (on Kelvin scale) will be 'n' times the temperature of another source (on Kelvin scale) for which the wavelength at maximum energy is $5.5\times {10}^{-5}$ cm.The value 'n' is

• A. 2
• B. 4
• C.
• D. 1

Answer 1

The correct option is C

$\frac{T_1}{T_2}=\frac{{\lambda }_{m_2}}{{\lambda }_{m_1}}=\frac{1}{2}\Rightarrow n=\frac{1}{2}$