Question

Kirchoffs law states that

• A. a body absorbs radiation of shorter wavelengths and emits radiation of higher wavelength
• B. a body absorbs radiation of any wavelength but emits radiation of specific wavelengths
• C. a body absorbs and emits radiation of same wavelengths
• D. none of these

Answer 1

The correct option is C a body absorbs and emits radiation of same wavelengths

In thermodynamics, Kirchhoff's law of thermal radiation refers to wavelength-specific radiative emission and absorption by a material body in thermodynamic equilibrium, including radiative exchange equilibrium.