Physics - refraction of light and partial and total internal reflection

When the beam of light enters a new medium, one side of the beam enters first and changes speed so the entire beam turns to keep itself uniformly straight

Why does light bend

Refraction

The bending of light when it travels between two different mediums

Refracts towards the normal

When light travels from a less-dense medium into a denser medium

Refracts away from the normal

When light travels from a denser medium into a less dense medium

N = C/V

Index of Refraction Formula

Index of refraction

N(in index of refraction formula meaning)

Speed of light in a vacuum

C(in index of refraction formula meaning)

Speed of light in the provided medium

V(in index of refraction formula meaning)

Critical angle

The angle in which when a ray of light refracts into it, it will stay/travel just along the border/division between the two mediums(staying in the one that it first entered)

Total internal reflection

A phenomenon in which the ray of light stays in and reflects within the first medium which occurs when the angle of the light ray is greater than the critical angle