A slide is a positive photography created on a transparent support from photochemical means to later be projected.
The slide, also called film and transparency It differs from negative film, which is the film used in traditional photographic cameras, and photographic prints, which is the reproduction of a photograph in a printing press, that is, using a press. Furthermore, the slide is used as a movie film since it produces a positive image without the need for negative intervention.
The most common type of slide is 35 mm., which is a positive image drawn in a movie of 35 mm. standard, which at the same time is located inside a plastic or cardboard frame, while the standard size of the frame for 35 mm slides. It is 50x50 mm.
Evolution
We could say that the slide is a kind of photo that is used at the behest of projections of all kinds and missions. The use of them was very common in the past when making presentations. Today they have been aggiornated and used in computers.
The slides of yesteryear were types of films on which a powerful light was emitted and thus an image was projected directly onto a wall or a white screen that was specially designed to carry out this type of action.
The process is very similar to that used in the cinema except that in the cinema the images pass at a faster speed than the vision of the human eye can recognize, creating the famous illusion of movement.
The old projectors used a manual movement mechanism, the transparency was manually removed from one side and replaced by another, on the other hand, the more modern projectors use a disk called a carousel that admits several slides which are automatically pushed out of it to thus be placed in front of the incandescent lamps.
Applications and uses
In the educational and business fields it was where the slides have been used for presentations of special classes or products, respectively. They were a very effective means of transmitting information and knowledge to the corresponding audiences.
As the presentation in question progressed, the slides were changed by a mechanism activated by the presenter himself or an assistant. Today obviously this procedure has become absolutely obsolete thanks to the development that technology has shown in this regard.
The Microsoft company has developed a specific software that works similar to this procedure and that of course connects to personal computers.
And at the behest of the computing, more especially in the context of the program Powerpoint, a presentation program created by the company Microsoft, a PowerPoint presentation is a file that shows a series of multimedia digital slides that facilitate the presentation of a certain topic; Although a PowerPoint presentation does not delve into a topic, it is widely used in the fields of business and academia, since it allows us to transmit important information with texts, sounds, videos and graphics, accompanying the oral presentation of a person.
With this software installed on the computer, it is enough to be able to carry out the aforementioned procedure for the slide shows and without the need for a separate projector.
In student presentations and also in the business field of the presentation of new products, the use of this procedure is still common, but of course everything is dumped and managed from a computer, and it is not even necessary for the presenter to be assisted by another person to do it but you can directly go through the images while presenting your speech.
