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The spectral distribution of the thermal energy radiated by a blackbody (i.e. the pattern of the intensity of the radiation over a range of wavelengths or frequencies) depends only on its temperature.

What do you mean by spectral distribution?

Definition of spectral distribution : a function expressing analytically or graphically the relation between radiant or luminous flux per wavelength or frequency interval and wavelength or frequency.

What is the spectrum of black body?

Black-body radiation has a characteristic, continuous frequency spectrum that depends only on the body's temperature, called the Planck spectrum or Planck's law.

What is spectral distribution of radiation?

The spectral distribution has a shape known as a black body curve with the peak occurring at around 5000 Angstroms – in the middle of the range of wavelengths which we are able to see. For higher, or lower, wavelengths the radiation produced by the Sun decreases.

What is spectral density blackbody?

In physics, Planck's law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature T, when there is no net flow of matter or energy between the body and its environment.

What is a spectral distribution chart?

The spectral distribution chart is a visual representation of the light spectrum produced by a lamp. It is a graph showing the relative intensities of a light source at each wavelength. These charts can be used to compare the energy levels of various light sources.

What is black body radiation in physics?

Blackbody radiation refers to the spectrum of light emitted by any heated object; common examples include the heating element of a toaster and the filament of a light bulb.

Why is black body radiation continuous?

Whenever a blackbody emits radiation, it corresponds to an electron jumping from higher energy state to a lower energy state and because of this an electron in excited state has a very large number of 'energy levels below', it can jump into any of the empty states giving a continuous spectrum.

What are the characteristics of a black body radiation?

As a consequence of this definition, the blackbody has three properties: (a) it is the surface that emits most for a given temperature and wavelength, (b) blackbody radiation does not depend on the direction, that is, blackbody radiation is diffuse, and (c) total blackbody radiation in a vacuum depends only on …

What is black body radiation Shaalaa?

A blackbody is a theoretical or model body that absorbs all radiation falling on it, reflecting or transmitting none. It is a hypothetical object which is a “perfect” absorber and a “perfect” emitter of radiation over all wavelengths.