A black body emits radiation of maximum intensity at wavelength ' λ ' at temperature T K. Its corresponding wavelength at temperature 1.5 T K will be (a) (2λ)/(3) (b) (4λ)/(3) (c) (16λ)/(81) (d) (81λ)/(16)

Answer: (a). Wien's law: λm ∝ 1/T. λ' = λ T/1.5T = (2λ)/(3) So the answer is (a) (2λ)/(3).

A black body emits radiation of maximum intensity at wavelength ' λ '… | MHT CET 2025 (25 Apr, Shift 2)

Q44MHT CET 2025 · 25 APR · SHIFT 2Easy

Thermal Radiation: Black Body, Stefan & Wien

A black body emits radiation of maximum intensity at wavelength ' $\lambda$ ' at temperature T K. Its corresponding wavelength at temperature 1.5 T K will be

Show answer and solution

Answer: (a)

Wien's law: $\lambda_m \propto \dfrac{1}{T}$ .
$\lambda' = \lambda \dfrac{T}{1.5T} = \dfrac{2\lambda}{3}$
So the answer is (a) $\dfrac{2\lambda}{3}$ .

Report a mistake

More questions on Thermal Radiation: Black Body, Stefan & Wien

The following graph represents the radiant power versus wavelength of the black body. The…MHT CET 2025 (20 Apr, Shift 2)
Two bodies A and B at temperatures ' T₁ ' K and ' T₂ ' K respectively have the same…MHT CET 2025 (22 Apr, Shift 2)
A wire of length 10 cm and diameter 0.5 mm is used in a bulb. The temperature of the wire…JEE Main 2025 (7 Apr, Shift 1)
The outer surface of star in the form of a sphere radiates heat as a black body at…MHT CET 2025 (5 May, Shift 2)
Two spherical black bodies have radii ' R₁ ' and ' R₂ '. Their surface temperatures are '…MHT CET 2025 (26 Apr, Shift 2)
A black sphere has radius R whose rate of radiation is E at temperature T. If radius is…MHT CET 2025 (26 Apr, Shift 2)
Two spherical black bodies have radii ' R₁ ' and ' R₂ '. Their surface temperatures are…MHT CET 2025 (23 Apr, Shift 1)
If a black body at 400 K surrounded by atmosphere at 300 K has rate of cooling ' R₀ '…MHT CET 2025 (21 Apr, Shift 2)

Thermal Radiation: Black Body, Stefan & Wien question from MHT CET 2025 (25 Apr, Shift 2)

More questions on Thermal Radiation: Black Body, Stefan & Wien