Question

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

विकल्प

• A black body emits all wavelengths.

• Intensity is less for longer wavelengths.

• Intensity is the same for all wavelengths.

• Intensity is more for shorter wavelengths.

Answer 1

Intensity is the same for all wavelengths.

Explanation:

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.