Meaning of Radio
What is Radio:
The word radio comes from Latin radĭus ("lightning") and has several meanings:
- In Geometry, the radius is the straight line that can be drawn from the center of a circle to the circumference. In this sense, a spoke is also a rod that connects the center of a wheel with the rim. The word "radius" is also used to refer to the circular extension of land, taking as a reference a point that serves as the center and the length of the radius.
- In Anatomy, the radius is a bone in the human body that, together with the ulna, forms the forearm.
- In chemistry, radium is a chemical element on the periodic table. Its symbol is Ra and its atomic number is 88. It is a shiny white metal with high radioactivity.
- In telecommunications, the word "radio" as a shortening of other words such as broadcasting, radio transmitter and radio receiver.
- As a compositional prefix, "radio" indicates "radiation", "radioactivity" or relationship to radio.
Radius in Geometry
The radius is a circle is a segment that connects the center with any point on the circle. All the radii of a circle have the same length and correspond to half the diameter. One way to find the radius of a circle is to take the square root of the division of the area by the number π. The radius in a sphere is a segment that joins the center with any point on its surface. The radius or apothem in a regular polygon corresponds to the radius of the circumscribed circle. In a regular polyhedron, the radius corresponds to the radius of the circumscribed sphere.
The atomic radius is the distance between the nucleus and the outermost shell. The atomic radius allows us to establish the size of an atom and is usually measured in ångströms (Å) or picometers (pm). For example, the atomic radius of Iron is 1.26 Å. Generally, the atomic radius increases as you descend through the groups in the table and decreases as you advance through a period.
Radio as a means of communication
Radio as a means of communication is the shortening of words like broadcasting, radiophony, radio transmitter or radio transmitter. In generic terms, it is understood that radio is a means of communication based on the emission and reception of audio signals by means of electromagnetic waves. Its invention dates from the end of the 19th century and its subsequent development was a revolution in the world of telecommunications.
Referring to a vehicle, the turning radius is the minimum distance in which a vehicle can turn on itself. In the field of Engineering, sa speaks of radius of gyration to refer to a geometric magnitude of the cross section of a mechanical prism and one-dimensional resistant element. In Kinematics, this concept is used by indicating the radius of curvature of the path of a particle.