You mean the speed of photons remains unchanged. The speed of light (not photon) changes in mediums because photons are absorbed and reemitted by atoms.jeesusfreek said:nopers, the speed of light remains unchanged through all medium.
the frequency also remains unchanged through all medium, and therefore its wavelength as well.
the only thing that changes with the index of refraction is the angle of refraction i.e. the angle at which light leaves the object in relation to the angle at which it entered the object.
That's just wrong; wavelength and speed do change. This is necessary to understand optics, lenses, etc. As for the OP, to calculate and correctly understand "why" the speed changes would seem to require quantum electrodynamics.jeesusfreek said:nopers, the speed of light remains unchanged through all medium.[..] and therefore its wavelength as well.
The speed of light is approximately 299,792,458 meters per second, or approximately 670,616,629 miles per hour.
According to the theory of relativity, nothing can travel faster than the speed of light in a vacuum. However, some particles have been observed to travel faster than the speed of light in certain mediums, such as water or air.
The speed of light was first accurately measured by Danish astronomer Ole Rømer in the late 17th century using observations of the moons of Jupiter.
According to the theory of relativity, the speed of light has always been constant. However, some alternative theories suggest that the speed of light may have been faster in the early universe.
The speed of light is a fundamental constant in the universe and is a key factor in the theory of relativity. It affects how we perceive time and space, and is an important factor in understanding the nature of the universe.