Why hydrogen's absorption spectrum have certain wavelengths dark?
53874
Why don't absorption and emission lines cancel out in our Sun?
45093
Light spectrum dispersion effect in Blender?
72964
Why doesn't hydrogen gas exist in Earth's atmosphere?
104973
Why are hydrogen energy levels degenerate in $\ell$ and $m$?
5457
Why do shadows from the sun join each other when near enough?
19490
Why 8 am is darker than 12 pm?
114649
Why is the Sun approximated as a black body at ~ 5800 K?
11053
Planck's Law in terms of wavelength
63513
What is the minimum wavelength of electromagnetic radiation?
28519
Why are most metals gray/silver?
55948
Negative energy levels in the diagram for a hydrogen atom
41537
How does light combine to make new colours?
18115
Why do these dark lines appear in render mode?
34829
Why is water blue (on a quantum level)
119516
What is the actual mechanism behind the reflection of various colored light by material of different color?
149286
Why can't an energy level exist containing 0.9 electron wave wavelengths? Why must it be a whole number?
114913
What exactly is meant by the wavelength of a photon?