Does a black body emit radiation on all frequencies?

A black body emits at all wavelengths, but it doesn’t emit at all of them equally. Planck’s Law gives the spectral radiance of the body, that is, the amount of energy emitted at each wavelength. The energy distribution follows a curve, with the wavelength of peak emission determined by the temperature of the body.

Why do black bodies radiate?

Black body radiation means a body – independent of its color – that absorbs all the wavelength falling on it in the form of energy and does not reflect any of that wavelength, but instead it radiates what it absorbed with different wavelength.

What determines what a blackbody spectrum will radiate?

The energy that the blackbody absorbs heats it up, and then it will emit its own radiation. The only parameter that determines how much light the blackbody gives off, and at what wavelengths, is its temperature.

What is the spectrum of black body radiation in terms of wavelength?

Blackbody radiation is the electromagnetic radiation emitted by a blackbody by virtue of its temperature. It extends over the whole range of wavelengths of electromagnetic waves. The distribution of energy over this entire range as a function of wavelength or frequency is known as the blackbody radiation spectrum.

What do you mean by black body spectrum?

Definition of blackbody : an ideal body or surface that completely absorbs all radiant energy falling upon it with no reflection and that radiates at all frequencies with a spectral energy distribution dependent on its absolute temperature.

What is black body How can it be realized in practice?

Answer: A body which completely absorbs all heat radiation incident on it is called perfectly black body. A perfectly black body can not be realised in practice but materials like Platinum black or Lamp black come close to being ideal black bodies. Such materials absorbs 96\% to 85\% of the incident radiations.

What is a perfect black body explain ferry’s black body in practice?

A cavity with walls made of any material, with a small opening, is an excellent black body. This is Ferry’s black body. It also absorbs all electromagnetic radiation incident on it irrespective of wavelength.