What is the relationship between refraction and the speed of light?

Explanation:

Refraction: It is a process in which light ray travel from one medium to another medium.

When a light  travel form one medium to another medium then the speed of light changes.

When a light travel from rare to denser  medium then the light bend towards normal .

When a light travel form denser to rare medium then the light ray bend away from the normal.

Refractive index:It is a ratio of velocity of light in vacuum to the velocity of light in medium .It is a measure of change in speed of light when it passes from vacuum into material.It is represented by "n''.

Mathematical representation:

Where n=Refractive index of material

c=Velocity of light in vacuum

v=Velocity of light in medium

gravititional force is a force that is acting around you, it is non-contactable and it is a force that pulls you to the core of the earth.

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the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.