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Wavelength of maximum emission shifts to a fraction of its value: new power radiated by a black body

The same question, asked 11 times: 9 May 2023 S2*, 16 May 2023 S1*, 10 May 2024 S1*, 10 May 2024 S2*, 12 May 2024 S2*, 11 Apr 2026 S1*, 15 Apr 2026 S2*, 16 Apr 2026 S1*, 18 Apr 2026 S2*, 14 May 2026 S2, 19 May 2026 S2. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    9 May 2023 S2

    35
    A black body radiates power 'P' and maximum energy is radiated by it at a wavelength λ0\lambda_0. The temperature of the black body is now so changed that it radiates maximum energy at the wavelength λ04\frac{\lambda_0}{4}. The power radiated by it at new temperature is

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  2. Question 2

    16 May 2023 S1

    23
    The power radiated by a black body is P and it radiates maximum energy around the wavelength λ0\lambda_0. Now the temperature of the black body is changed so that it radiates maximum energy around wavelength λ02\frac{\lambda_0}{2}. The power radiated by it will now increase by a factor of

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  3. Question 3

    10 May 2024 S1

    1
    A black body radiates maximum energy at wavelength 'λ\lambda' and its emissive power is E. Now due to change in temperature of that body, it radiates maximum energy at wavelength 2λ3\frac{2\lambda}{3}. At that temperature emissive power is

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  4. Question 4

    10 May 2024 S2

    25
    A black body radiates maximum energy at wavelength 'λ\lambda' and its emissive power is 'EE'. Now due to change in temperature of that body, it radiates maximum energy at wavelength '2λ3\frac{2\lambda}{3}'. At that temperature emissive power is

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  5. Question 5

    12 May 2024 S2

    25
    A black body radiates maximum energy at wavelength 'λ\lambda' and its emissive power is 'EE'. Now due to a change in temperature of that body, it radiates maximum energy at wavelength λ3\frac{\lambda}{3}. At that temperature emissive power is

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  6. Question 6

    11 Apr 2026 S1

    114
    The energy spectrum of a black body exhibits a maximum of wavelength λ0\lambda_0. The temperature of the black body is now changed such that the energy is maximum at wavelength 3λ02\dfrac{3\lambda_0}{2}. The ratio of power radiated by the black body will be

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  7. Question 7

    15 Apr 2026 S2

    114
    The energy spectrum of a black body exhibits a maximum around a wavelength λ\lambda. The temperature of a black body is now changed such that the energy is maximum at wavelength 2λ/32\lambda/3. The power radiated by the black body will now increase by a factor of

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  8. Question 8

    16 Apr 2026 S1

    115
    The energy spectrum of a black body exhibits a maximum around a wavelength 'λ\lambda'. The temperature of the black body is now changed such that the energy is maximum around a wavelength 2λ/32\lambda/3. The power radiated by the black body will now increase by a factor

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  9. Question 9

    18 Apr 2026 S2

    112
    A black body radiates maximum energy at wavelength 'λ\lambda' at temperature T1T_1 and its emissive power is E. When the temperature of the body is changed to T2T_2, it radiates maximum energy at wavelength 2λ3\dfrac{2\lambda}{3}, then the emissive power will become

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  10. Question 10

    14 May 2026 S2

    112
    The power radiated by a black body is P and it radiates maximum energy at wavelength λ0\lambda_0. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength 3λ04\dfrac{3\lambda_0}{4}, the power radiated by it becomes nP. The value of n is

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  11. Question 11

    19 May 2026 S2

    113
    The power radiated by a black body is PP and it radiates maximum energy at wavelength λo\lambda_o. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength 0.75λo0.75\lambda_o, the power radiated by it becomes nPnP. The value nn is

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