Where does the refraction occur when the light enters a different medium?

Explanation:

The speed of light when it travels through glass, diamond, etc, the light travels at different speed from the speed of light. Speed of the light in material is related to the index of refraction.

Hence, light have different speeds in different medium and also, will have different wavelength in different mediums.

The change in speed which occurs when the light passes from one medium to the another is responsible for bending of the light which is called as refraction.

Further, if the light travels from a low denser medium to high denser medium, it refracts towards the normal and if the light travels from high denser medium to low denser medium, it refracts away from the normal. The refraction of light happens at the point of incidence.

the area between the graph and the t axis

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west