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CGP EDU Academic Team
Published on: September 12, 2026
If at temperature $T_{1} = 1000 \mathrm{K},$ the wavelength is $1.4 \times 10^{-6} \mathrm{m},$ then at what temperature the wavelength will be $2.8 \times 10^{-6} \mathrm{m}$
Text Solution
Verified by ExpertsThe correct answer is:
A
$\lambda_{m} \propto \frac{1}{T} \Rightarrow \lambda m_{1} T_{1} = \lambda m_{2} T_{2}$ $\Rightarrow T_{2} = \frac{\lambda m_{1} T_{1}}{\lambda m_{2}} = \frac{1.4 \times 10^{-6} \times 1000}{2.8 \times 10^{-6}} = 2000 \mathrm{K}$
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