What is a blackbody radiator?

Answer 1

Blackbody raditaition is a form of electromagnetic energy that is created from a blackbody (something that reflects or absorbs all incident energy). If a blackbody is in thermodynamic equilibrium (constant non-changing temp. 0 net force) it will radiate blackbody radiation which changes with temperature. Higher temp. calls for shorter wavelengths and higher intensity. The hue is generally infared and cant be seen. some times you can see a faint red or orange glow. glad to answer.

Answer 2

This is the name given to the spectrum of radiation given off by heated objects. In the 1800s, scientists noted that the spectrum from a heated object depends almost entirely on the temperature of the object, and not on its composition. They thus concluded that the cause of this radiation was not a chemical reaction, but due to a more fundamental facet of matter itself. It turns out they were correct, and the search for this resulted in the start of quantum theory.

Answer 3

Blackbody radiation extends over the entire electromagnetic spectrum. Its intensity

is greater at some wavelengths and smaller at others. The unique shape of the graph

of intensity vs wavelength is what gives it the name "blackbody", and the wavelength

at which the peak intensity occurs depends on the temperature of the blackbody.

Answer 4

Black body radiation (BBR) is a term developed in the 1800s during the study of that type of light. It was found that all glowing objects, no matter what the material, had a spectrum of light that depended solely on the temperature of the object. It was thus thought that this light had its origin in a fundamental nature of matter. While trying to explain this light emission, it was found it could be PARTIALLY explained by assuming that glowing objects were like perfect absorbers of all types of light -- ie, completely black; ie, black bodies. Thus the terminology "black body radiation."

In 1900, Max Planck found that he could FULLY explain the spectrum if he assumed that light came in chunks he called "quanta." He originally thought this was just a mathematical oddity, but scientists eventually concluded this was, in fact, a description of reality. This was the start of quantum mechanics.

Answer 5

So, a black body is an object that absorbs all incident electromagnetic radiation and is at some temperature, T. I think your question is, what is the source of the black body radiation? I will try to put it in layman's terms.

So, an object is made up of some material, correct? This material object is composed of atoms (as is all of matter). Atoms are made up of protons, electrons, and neutrons. The material can be made up of ions (charged particles) if some of the atoms are missing (or have an excess) of an electron/s.

Temperature is related to the average kinetic energy of the particles that make up the material. The black body is at some temperature, T, so these charged particles (ions, electrons...) must have non-zero kinetic energy. This means that these charged particles are moving (they are thermally agitated). Imagine that the electrons and ions in the material that makes up the black body are vibrating. BUT, moving charges emit electromagnetic radiation. This is the source of the black body radiation.

Answer 6

A blackbody radiator, also known as a cavity radiator, is an object or system which absorbs all radiation. It then re-radiates the energy which is characteristic of the radiating system.