2006 Nobel Prize in Physics
Awarded to: John C. Mather, George F. Smoot
Their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation.
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Source: Wikipedia / Nobel Foundation
In 2006, the Nobel Prize in Physics was awarded to John C. Mather, George F. Smoot.
The prize recognized: Their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation.
A black body or blackbody is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.
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Source: Internal
Why does the blackbody form matter?
Understanding the blackbody form is fundamental to how we explain the physical world. The work recognized in 2006 helped scientists build more accurate models of nature, leading to practical technologies and a deeper understanding of why things behave the way they do.
It is an ideal emitter: at every frequency, it emits as much or more thermal radiative energy as any other body at the same temperature.
It is a diffuse emitter: measured per unit area perpendicular to the direction, the energy is radiated isotropically, independent of direction.
Real materials emit energy at a fraction—called the emissivity—of black-body energy levels. By definition, a black body in thermal equilibrium has an emissivity ε = 1. A source with a lower emissivity, independent of frequency, is often referred to as a gray body.
Constructing black bodies with an emissivity as close to 1 as possible remains a topic of current interest.
In astronomy, the radiation from stars and planets is sometimes characterized in terms of an effective temperature, the temperature of a black body that would emit the same total flux of electromagnetic energy.
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Source: Nobel Foundation
Historical context: 2006
John C. Mather, George F. Smoot (various countries) received the Nobel Prize in Physics in 2006.
The official citation from the Nobel Committee reads:
"for their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation"
The Nobel Prize in Physics has been awarded since 1901. Each award marks a turning point in humanity's understanding of the physical universe.
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