Answer:
The index of refraction
What is the index of refraction?
The index of refraction tells us how much slower or faster light travels from one medium to another.
- What is a medium? ⇒ the substance that light passes through
The formula to find the refractive index of a substance is the following:
[tex]n=\dfrac{c}{v}[/tex]
- [tex]c[/tex] = the speed of light in a vacuum ([tex]3.00*10^8[/tex] m/s)
- [tex]v[/tex] = the speed of light in the medium
This makes the index of refraction defined as the ratio of:
- the speed of light in a vacuum
- the speed of light in the material it passes through
