When a gas is very hot, it doesn’t emit all wavelengths of light. Hot gases don’t produce a continuous emission spectrum. Black hydrogen absorption lines are at the same wavelength as the ...

The absorption of light by ... reflectance is recorded as a function of wavelength. The resulting spectrum can be analyzed to extract information about the sample's optical properties and electronic ...

Therefore, it is key to be able to tell the difference between absorption and interference filters. In this article, we take ...