Centuries of Moon depictions on display in New York

Some 400 years of depictions of the Moon, particularly via photography, are going on display at New York's Metropolitan Museum of Art ahead of the 50th anniversary of the Apollo 11 landing.

New power supply unit lets electrical devices live longer

From the charging unit for smartphones to the power supply of the laptop or washing machine to LED lights or charging stations of electric cars – switching power supplies are omnipresent in electrical devices. They convert ...

Flash photography doesn't harm seahorses – but don't touch

We all enjoy watching animals, whether they're our own pets, birds in the garden, or elephants on a safari during our holidays. People take pictures during many of these wildlife encounters, but not all of these photographic ...

What Paris shows us about the history of photography

Imagine a photo of Paris you've seen before, whether it's the Eiffel Tower or an urchin carrying a baguette. Have you ever considered the story behind that picture—why it was taken, and why it's in circulation today?

Lifespan of new solar cell technologies to increase tenfold

Armi Tiihonen defended her doctoral dissertation at Aalto University 6 April 2018 on the ageing of new kinds of perovskite and dye-sensitised solar cells. She has developed ways to increase the lifetime of solar cells and ...

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Photography

Photography is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light-sensitive material such as photographic film. Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. The result in an electronic image sensor is an electrical charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or processing. The result in a photographic emulsion is an invisible latent image, which is later chemically developed into a visible image, either negative or positive depending on the purpose of the photographic material and the method of processing. A negative image on film is traditionally used to photographically create a positive image on a paper base, known as a print, either by using an enlarger or by contact printing.

Photography has many uses for business, science, manufacturing (e.g. Photolithography), art, and recreational purposes.

As far as can be ascertained, it was Sir John Herschel in a lecture before the Royal Society of London, on March 14, 1839 who made the word "photography" known to the world. But in an article published on February 25 of the same year in a German newspaper called the Vossische Zeitung, Johann von Maedler, a Berlin astronomer, had used the word photography already. The word photography is based on the Greek φῶς (photos) "light" and γραφή (graphé) "representation by means of lines" or "drawing", together meaning "drawing with light".

This text uses material from Wikipedia, licensed under CC BY-SA