An ideal black body is an imaginary concept developed by Gustav Kirchhoff that perfectly absorbs all electromagnetic radiation that falls on it and reflects none. It plays a significant role in quantum mechanics by being a perfect emitter and absorber of thermal radiation, releasing electromagnetic radiation when heated that follows specific laws like Planck's quantum law, Wien's displacement law, and Stefan-Boltzmann law. Real blackbodies have opaque, closed surfaces that absorb radiation based on factors like temperature, emissivity, and surface area, and their radiation is used in applications like thermal imaging, optical sensors, and burglar alarms.

1. An ideal black body
is an imaginary
perception of
Gustav Kirchhoff
It played a significant role in
the development of quantum
mechanics.
Mind map
Blackbody
Jayam
chemistry
adda
A blackbody is a rigid, closed unreal
body that can absorb all
electromagnetic radiation that falls on
it regardless of its frequencies, but it
reflects none.
It is a perfect
emitter and
absorber of
thermal
radiations
On heating, the blackbody
releases all thermal
electromagnetic radiation . It is
blackbody radiation.
The surface of a blackbody is
opaque. It neither transmits light
nor reflects it. Hence, its absorbing
and emissive powers are one
Definition
Affecting
factors
Temperature
Emissivity
Surface area
Planck quantum law
Used in thermal imaging.
Applications
Laws governing
Wien displacement law
Stefan-Boltzmann law
Used in optical sensors.
Used to provide security in burglar alarms.