# What is prism?

## What Does prism Mean

Prism comes from the Latin prism and has its most remote antecedent in a Greek word. In the field of geometry , a body is known as a prism whose limits are established by a pair of equal and flat polygons, arranged in parallel, and various parallelograms, according to the number of sides that their bases have. This means that if the bases are triangles, we are talking about a triangular prism .

A prism whose lateral faces are rectangular is called a right prism . If we have a right prism and we want to calculate its volume, we must estimate the product of the area of some of its bases by the height (that is, by the distance between them).

In the field of optics , a prism is a medium endowed with transparency that is delimited by flat faces that are not parallel. These prisms, which are usually made of glass, are used to cause light to break down, reflect, or refract.
The reflective prisms merely reflect the light and are used in instruments such as monocular and binoculars. The polarizing prisms , however, the light beams divided into fragments with different polarization. The dispersive prisms finally allow to achieve the decomposition of light in the spectrum of the rainbow.
The notion of prism, on the other hand, is often used to refer to perspective , opinion, or opinion. For example: "You have to look at the situation from another prism to understand it . "
Finally, Prism is the name of the asteroid that A. Schwassmann discovered in March 1931.
History of binoculars
Binoculars are smaller refracting telescopes with a lower magnification capacity, but with a wider field of view . To classify them, a multiplication of their degree of magnification is composed by the opening diameter of the front lens in millimeters. Its usefulness in our times varies, and in cities they are usually used in theaters, to be able to visualize in detail the stage and the expressions of the actors and singers.
There are no very clear data about their creation, but it is necessary to string together a series of events and discoveries to understand how they came into being. The first person to register a patent detailing the construction of a telescope was an eyeglass manufacturer named Hans Lippershey, who lived in present-day Holland in 1608.
Through this document, he requested exclusive manufacturing rights for thirty years. However, his request was denied on the grounds that it was not a novel product and that it would cause the same fatigue problems as monoculars. In fact, Hans had been inspired by these annoyances to create a device that allowed the use of both eyes, to avoid fatigue.

Galileo's name is the first to be mentioned when talking about binoculars and there are those who claim that in 1618 he used a helmet that had binoculars when embarking on a sea voyage, but there is no confirmation. Other people referred to, through various contributions, are Ottavio Pinani and Cherubin d »Orleans, author of a detailed illustrated book about telescopes of this type, and Pietro Patroni, a manufacturer whose instruments are objects. of collections and antique dealers.
Until that moment, the images obtained with the telescopes were shown upside down, because of using the Galileo system. Two centuries later, a major innovation ushered in a new era for binoculars: a final investment was made before the frame came to the user's eyes, so that the result would be seen normally.

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