# KEYWORDS

ACOUSTICS: In a closed place, the characteristics of the propagation of sound in said place are thus called, at the same time that in Physics studies, the phenomena that produce, transmit, receive, control and allow the perception of sound (hearing/hearing).

ASTROPHYSICS: Study of the evolution, origin and properties of celestial bodies, using their physical properties.

ELECTROMAGNETIC RADIATION: Composed of both electric and magnetic fields, it is actually synonymous with the electromagnetic spectrum, that is, electromagnetic radiation is measured according to its characteristics and is located in a place within the emission spectrum, as radiation ultraviolet, gamma radiation, X-rays, microwaves, AM and FM radio wave transmission, etc.

ELECTROMAGNETIC SPECTRUM: It is the set of electromagnetic waves that form the entire possible existing transmitted spectrum, from low frequency waves and low radiation such as sound waves or radio waves; up to the highest frequencies with very high radiation, such as X and Gamma radiation.

ENERGY: It is the ability of matter to transform to another state and during that process to be able to produce what is known as work, which is perceived in the form of Light, Movement, Heat, etc. Depending on the type of energy emitted, the units of measurement can change, for example, for Light the Watt is used, for movement the Joules, or Horsepower, etc.

GAMMA RAYS: Electromagnetic radiation of high penetration with very high wave frequency that is released after the disintegration of radioactive elements.

INFRARED LIGHT: Electromagnetic radiation, shorter wavelength and higher frequency than microwaves, but longer wavelength and lower frequency than visible light.

MICROWAVE: Electromagnetic waves between 300 MHz and 300 GHz, its oscillation period is from 3 s to 33 s and its wavelength is 10 mm to 1 m.

NANOMETERS: It is the billionth part of the meter. They are used to measure wavelengths of the light spectrum (light wave), as well as the distance between atoms in molecules.

RADIO ASTRONOMY: It is the study of the celestial bodies based on the emission of electromagnetic waves that these objects emit.

RADIO TELESCOPE: Receiving instrument used in radio astronomy serves to convert the physical signal into a measurable signal to record the radio waves emitted by celestial bodies.

RADIOMAGNETISM: In Telecommunications, this is the name given to the electromagnetic waves emitted during a radio transmission. They are directly related to Hertzian waves.

RED LIGHT: Its wavelength is from 625nm to 740nm, the human eye perceives it in red (in the visible spectrum that is approximately 400nm to 700nm).

ULTRAVIOLET LIGHT: It is electromagnetic radiation with a wavelength between approximately 100 nm and 400 nm, also known by the acronym UV.

VIOLET LIGHT: It is monochromatic in color which, as its name indicates, is violet and corresponds to a visible spectrum with a wavelength between 380nm and 420nm (nanometers).

X-RAYS: It is an ionizing corpuscular radiation, invisible to the human eye and capable of passing through opaque bodies and generating impressions on photographic film.