Nobel Prize in Physics goes to Francis Halzen

Re:Nobel Prize in Physics goes to Francis Halzen by pfdietz on Tuesday October 06, 2026 @08:40AM (#49977540)

And remember, the "speed of light in the medium" depends on the wavelength of the light. This is why prisms separate light by color.

[ Parent | on HN ]

Re:Nobel Prize in Physics goes to Francis Halzen by adrian_b on Wednesday October 07, 2026 @08:30AM (#49991843)

More clearly, in a dispersive medium like a prism, the wavelength of the light depends on its frequency.

Because the speed of light (in the sense of phase velocity) is the product of wavelength with frequency, both the speed and the wavelength vary with frequency, thus also the refractive index varies with frequency.

[ Parent | on HN ]