Difference between incident ray and refracted ray

** incident ray.

Incident ray - the ray of light falling on the surface AB is called the incident ray

reflected ray.

** Reflected ray - the incident ray bouncing back in the same medium after striking the reflecting surface is called reflected ray.

measure their densities same density, same sub

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.