Investigating How the Speed of Light Differs in Air and in Perspex

I will examine how the speed of light differs with the plan of air and plexiglass. Examine the difference in speed between air and plexiglass light. Background Information: Refractive index is the ratio of calculated speed of light. The ratio of different substances is different. This indicates how much light refracts different substances. When passing from a low-density medium to a more dense medium, the light is refracted towards the normal so that the incident angle i is larger than the refraction angle, ie Willebrord van Roijen Snell (1591-1626) I propose an explanation of the angles sine and th. Law of proportion

As light travels from a less dense medium to a dense medium (from air to plexiglass), the light turns towards the normal and as the beam progresses from a dense medium to a less dense medium it bends from the normal. The light entering the plexiglass plate must be parallel to the light emerging from the distal end of the plexiglass (they only experience lateral movement). Light is refracted and moves at various speeds when it encounters new media. The greater the change in speed, the more light will turn more strongly against the normal. However, even if the speed changes, the frequency has not changed. When the light beam propagates from the air to the plexiglass, as the light beam propagates from the initial medium to the next medium, the speed decreases and the light bends in the normal direction.

A prism works by changing the speed of light as it moves from one medium to another (eg glass enters the prism from the air). According to the principle of Huygens, the change in speed refracts the light to a new medium at different angles; this is an analytical way applied to wave propagation problems. According to Snell's law, the degree of path curvature of light depends on the angle of incidence of the beam to the surface and the difference between the refractive indices of the two media. As shown, the refractive index of many materials, eg glasses, varies with the wavelength or color of the light used and is a phenomenon known as dispersion. It refracts light of different colors differently, refracts the prism at different angles, and creates a rainbow.