The velocity of light is greatest when travelling through a vacuum.
When travelling through something else, a glass material say, then its velocity is slower.
The refractive index is the ratio of the speed of light in a vacuum to the speed of light in that substance. For example light travels in a vacuum about 1.3 times as fast as in water, so we say water has a refractive index of 1.3.
And it is likely that the velocity in the glass will be different at different wavelengths of light.
It happens by the refraction of light.
sh@@ happens
The light refracts or bend .
It is redirected as it passes through a medium.
it refracts
It is redirected as it passes through a medium
Refracted light
It shows color.
it travels at c (speed of light in a vacuum)
it makes a rainbow!
When light passes through a prism, it is refracted, which means it is bent or separated into different colors. This happens because light waves travel at different speeds through different materials, causing them to change direction.
the colors of light seperates to show all the colors of light.