Electromagnetic waves - They are waves that can propagate in a vacuum, electromagnetic radiation - It is a type of variable electromagnetic field, that is, a combination of oscillating electric and magnetic fields, which propagate through space, transporting energy from one place to another., electromagnetic spectrum - energetic distribution of all electromagnetic waves., spectrum - electromagnetic radiation that emits (emission spectrum) or absorbs (absorption spectrum) a substance, photons - The energy carried by electromagnetic radiation travels by means of waves. This energy is not continuous, but is transmitted grouped in small "quanta" of energy, radiation - emission, propagation and transfer of energy in any medium in the form of electromagnetic waves or particles, geometric optics - It is based on the concept of a light ray as a path followed by material particles emitted by luminous bodies without worrying about studying the nature of light., physical optics - studies the luminous phenomena and investigates what is the nature of light., Light - A form of energy that illuminates things, makes them visible, and spreads through particles called photons., Reflection - occurs when light rays that hit a surface collide with it, deviate and return to the medium that they left forming an angle equal to that of the incident light,, Refraction - It is the change of direction and slowness that a wave experiences when passing from one medium to another with a different refractive index., optical fiber - A filament of dielectric material, such as glass or acrylic polymers, capable of conducting and transmitting light impulses from one end to the other,

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