About black body radiation, which of the following is the wrong statement?

1. For all wavelengths, intensity is same.
2. For shorter wavelengths, intensity is more.
3. For longer wavelengths, intensity is less.
4. All wavelengths are emitted by a black body.

Solution

The intensity curve at various wavelengths for various temperatures is shown below.
A black body emits all wavelengths. The graph shows that intensity decreases with longer wavelengths and increases with shorter wavelengths.

Asked in: MHT CET 2023 (12 May Shift 1)

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