Uploaded March 2022 | Updated September 2026, 2 weeks ago
Does Plasma Produce a Black-body Spectrum?
Black-body radiation is the thermal electromagnetic radiation within a body in thermodynamic equilibrium with its environment. In a dark room, a blackbody at room temperature appears black because most of the energy it radiates is in the infrared spectrum and cannot be detected by the human eye. When the temperature of the object is increased to the lowest faintly visible temperature it will appear as grey even though its objective physical spectrum peak is in the infrared range. We cannot perceive colour at low light levels. When the object becomes a little hotter it appears dull red. As the temperature increases further it becomes red, orange, yellow, white and ultimately blue-white.
Although planets and stars are neither in equilibrium with their surroundings nor perfect black bodies, black-body radiation is used as a first approximation for the energy they emit.
So with this in mind let's examine if a plasma is capable of producing a blackbody emission spectrum.
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References:
https://books.google.com.au/books?hl=en&lr=&id=N12SoSZFAekC&oi=fnd&pg=PA1&ots=EmxD6Y3z23&sig=ytiIMszenTFfNWxQ74XnFj79dFk&redir_esc=y#v=onepage&q&f=false
researchgate.net/publication/254498364_Electrical_and_spectroscopic_characterization_of_underwater_plasma_discharge_inside_rising_gas_bubbles
en.wikipedia.org/wiki/Angstrom
en.wikipedia.org/wiki/Arc_lamp
space.com/38899-lightning-radioactive-particle-accelerator.html
amazon.co.uk/Physics-Plasma-Universe-Anthony-Peratt/dp/1461478189
00:00 Introduction
01:12 Arc Discharge Experiment
04:14 Black-body Spectrum of plasma filaments
07:07 Random Polarisation of Sychrotron Radiation
Does Plasma Produce a Black-body Spectrum?
Black-body radiation is the thermal electromagnetic radiation within a body in thermodynamic equilibrium with its environment. In a dark room, a blackbody at room temperature appears black because most of the energy it radiates is in the infrared spectrum and cannot be detected by the human eye. When the temperature of the object is increased to the lowest faintly visible temperature it will appear as grey even though its objective physical spectrum peak is in the infrared range. We cannot perceive colour at low light levels. When the object becomes a little hotter it appears dull red. As the temperature increases further it becomes red, orange, yellow, white and ultimately blue-white.
Although planets and stars are neither in equilibrium with their surroundings nor perfect black bodies, black-body radiation is used as a first approximation for the energy they emit.
So with this in mind let's examine if a plasma is capable of producing a blackbody emission spectrum.
Please consider supporting this channel through:
patreon.com/seethepattern
paypal.me/seethepattern
Merchandise Available:
shop.spreadshirt.co.uk/see-the-pattern
Follow me on:
facebook.com/SeethePattern
twitter.com/PatternSeethe
References:
https://books.google.com.au/books?hl=en&lr=&id=N12SoSZFAekC&oi=fnd&pg=PA1&ots=EmxD6Y3z23&sig=ytiIMszenTFfNWxQ74XnFj79dFk&redir_esc=y#v=onepage&q&f=false
researchgate.net/publication/254498364_Electrical_and_spectroscopic_characterization_of_underwater_plasma_discharge_inside_rising_gas_bubbles
en.wikipedia.org/wiki/Angstrom
en.wikipedia.org/wiki/Arc_lamp
space.com/38899-lightning-radioactive-particle-accelerator.html
amazon.co.uk/Physics-Plasma-Universe-Anthony-Peratt/dp/1461478189
00:00 Introduction
01:12 Arc Discharge Experiment
04:14 Black-body Spectrum of plasma filaments
07:07 Random Polarisation of Sychrotron Radiation
