Physics, asked by hanzala9171, 1 year ago

What does a hot, optically thin gas *look* like?

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Answered by bharath1119
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What does a hot, optically thin gas *look* like?

electromagnetic-radiation temperature thermal-radiationspectroscopy

In another question I tried to answer what a sample of the Sun's photosphere or core would look like, if it could be brought into the lab.

Here is a broader question - if I have a small inert container of gas in local thermodynamic equilibrium, that has the solar photospheric composition and photospheric density (∼10−9∼10−9 g/cm33 -i.e. it will be optically thin for a small lab sample), what would it look like (to the human eye) and how would it change as I cranked up the temperature from say 1000K through the solar photospheric temperature to say as high as 100,000K?

EDIT: Just as a steer - I know it will look nothing like a blackbody - that is why I am interested in it and why I emphasize the optically thin nature of the problem.

Answered by hermoinegranger7
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HEY !!!! PLEASE MARK BRAINLIEST
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*Optically thin simply means that the optical depth is much less than 1 so that emitted photons leave the gas without further interaction. e.g. The corona is not only seen by Thomson scattering (and very few escaping white light photons interact in this way) it is seen via optically thin (X-ray) emission from a >106>106K plasma. 
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