Out of the following, which statement is NOT true about black body radiation? (a) Intensity is more for shorter wavelengths ( λ). (b) Intensity is same for all wavelengths ( λ). (c) Intensity is less for longer wavelengths ( λ). (d) A black body emits all wavelengths ( λ).

Answer: (b). A black body emits all wavelengths, but the intensity varies with λ (the Planck curve has a peak at λm). Intensity is therefore not the same for all wavelengths. So the statement that is NOT true is (b).

Out of the following, which statement is NOT true about black body… | MHT CET 2026 (19 Apr, Shift 2)

Q11MHT CET 2026 · 19 APR · SHIFT 2Easy

Thermal Radiation: Black Body, Stefan & Wien

Out of the following, which statement is NOT true about black body radiation?

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Answer: (b)

A black body emits all wavelengths, but the intensity varies with $\lambda$ (the Planck curve has a peak at $\lambda_m$ ).
Intensity is therefore not the same for all wavelengths.
So the statement that is NOT true is (b).

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