Geometric optics

Hi, welcome back to the blog of "The silence of black". Today we will deal with a topic that represents a pillar in the field of physics: "geometric optics". Sometimes we associate and connect basic optics and geometric optics to each other, but in reality these electromagnetism branches have a concept that is anything but similar. Optics studies light radiation and associated phenomena, while geometric optics deals with those phenomena that can be described without the use of the wave concept. The latter began to spread in the early 1600s and for centuries we will see two different models of light contrast: the corpuscular model developed by Newton according to which light is a flow of microscopic particles and the wave model developed by Christiaan Huygens which in fact, from how we can deduce it from the model name, it defines light as a wave. With geometric optics we can explain:

- the WAVES

- the REFLECTION of light

- the REFRACTION of light

- the DIFFUSION

Light does not propagate immediately, but at a finite speed. The speed of light in vacuum, indicated with the letter c, is equivalent to 299792.458 km / s.

Light is therefore considered as a ray that propagates rectilinearly in a homogeneous medium. When the light passes from a first to a second transparent medium in both it will propagate following a straight line.

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