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MHT CET 2024 (16 May, Shift 1) · Thermal Radiation: Black Body, Stefan & Wien

Thermal Radiation: Black Body, Stefan & Wien question from MHT CET 2024 (16 May, Shift 1)

Q68MHT CET 2024 · 16 MAY · SHIFT 1Medium

Thermal Radiation: Black Body, Stefan & Wien

The power radiated by a black body is P and it radiates maximum energy around the wavelength $\lambda_0$ . Now the temperature of the black body is changed so that it radiates maximum energy around wavelength $\left(\frac{\lambda_0}{2}\right)$ . The power radiated by it will now increase by a factor of

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Answer: (c)

Wien: $\lambda_m \to \frac{\lambda_0}{2}$ means $T \to 2T$ .
Stefan: $P \propto T^4 \Rightarrow$ factor $2^4 = 16$ .
So the answer is (c) 16.

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