First slide

Radiation

Question

The wavelength of maximum energy released during an atomic explosion was 2.93 × 10^–10 m. Given that Wein's constant is 2.9×10^–3 m–K, the maximum temperature attained must be of the order of

Easy

A

10^–7K
B

10⁷K
C

10^-13K
D

5.86 x 10⁷K

Solution

λ_m.T = 2.93 x 10^-10 m; b = 2.93 x 10^-3mk
$\large \lambda_m=\frac bT\Rightarrow T=\frac {b}{\lambda_m}=\frac {2.9\times 10^{-3}}{2.93\times 10^{-10}}=10^7k$

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