Why does refractive index have no unit? Why is the eardrum larger than the oval window? Why is a conical flask used in titration? Why is the cornea clear and free of blood vessels? Why do stars differ in brightness? Why does rhyolite have smaller ...
Light in a medium travels at , where is the refractive index of the medium. Note that for vaccum. A postulate of special relativity is that light travels at in vacuum, as measured in any IRF. There is no postulate that light travels at in water. Jan 1, 2022 #8 sophiecentaur ...