A black body has maximum wavelength ' λm ' at temperature 2000 K. Its corresponding wavelength at temperature 3000 K will be (a) 4λm9 (b) 2λm3 (c) 3λm2 (d) 9/4λm

Answer: (b). Wien's law: λm T = constant. λ' = λm × (2000)/(3000) = (2λm)/(3) So the answer is (b) (2λm)/(3).

A black body has maximum wavelength ' λm ' at temperature 2000 K. Its… | MHT CET 2021 (21 Sep, Shift 1)

Q91MHT CET 2021 · 21 SEP · SHIFT 1Easy

Thermal Radiation: Black Body, Stefan & Wien

A black body has maximum wavelength ' $\lambda_{m}$ ' at temperature $2000\text{ K}$ . Its corresponding wavelength at temperature $3000\text{ K}$ will be

Show answer and solution

Answer: (b)

Wien's law: $\lambda_m T =$ constant.
$\lambda' = \lambda_m \times \dfrac{2000}{3000} = \dfrac{2\lambda_m}{3}$
So the answer is (b) $\dfrac{2\lambda_m}{3}$ .

Report a mistake

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

Two stars 'P' and 'Q' emit yellow and blue light respectively. The relation between their…MHT CET 2021 (20 Sep, Shift 2)
If the temperature of the sun is doubled, the rate of energy received by the earth will…MHT CET 2021 (22 Sep, Shift 1)
A black reactangular surface of area ' a ' emits energy ' E ' per second at 27. If length…MHT CET 2021 (21 Sep, Shift 1)
A black rectangular surface of area ' A ' emits energy ' E ' per second at 27. If length…MHT CET 2021 (20 Sep, Shift 2)
Three stars A, B, C have surface temperatures TA, TB, TC respectively. Star A appears…NEET 2020 (Phase 2)
Two spherical black bodies of radius r₁ and r₂ with surface temperature T₁ and T₂…MHT CET 2020 (16 Oct, Shift 2)
The SI unit and dimensions of Stefan's constant σ in case of Stefan's law of radiation isMHT CET 2019 (3 May, Shift 1)
The maximum wavelength of radiation emitted by a star is 289.8 nm. Then intensity of…MHT CET 2019 (2 May, Shift 2)

Thermal Radiation: Black Body, Stefan & Wien question from MHT CET 2021 (21 Sep, Shift 1)

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