How do cameras work chemistry?

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Alanna Treutel asked a question: How do cameras work chemistry?
Asked By: Alanna Treutel
Date created: Tue, Mar 2, 2021 9:49 PM
Date updated: Mon, Jun 27, 2022 9:23 PM

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Camera film uses silver halides (such as silver chloride, bromide or iodide) as the materials exposed to light. When the silver halide layer absorbs light, electrons within the layer attach to the halide crystals, creating what are known as sensitivity specks.

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chemistry in photography? There is actually plenty of fascinating chemistry going on—it’s just on a much smaller scale. Sensing light All cameras work by focusing light through lenses to create an image. A conven-tional camera records this image on film. A dig-ital camera records this image on a permanent part of the camera known as a sensor.

The chemistry of photography is based on photosensitivity and reactions with light. The chemical processes that create a traditional photograph start inside the camera with the absorption of photons. However, photochemistry alone is not able to produce an image. Development is continued in the darkroom through chemical reactions involving

Taking a Picture: Exposure Chemistry ­So, either manually or automatically, you now have an image that is focused on the film surface, and the proper exposure has been set through a combination of film speed, aperture settings (f-stop) and exposure time (usually fractions of a second, from one thirtieth to one one-thousandth of a second).

The image appears on the light sensitive film in 3 steps: First during the exposure i.e. when the shutter opens up to let a certain quantity of light or photons go through. It’s the moment when the latent image is being formed in the film emulsion. Then during the development when the latent image is “amplified” by the developing agent.

The reagent chemicals move downward through the laye­rs, changing the exposed particles in each layer into metallic silver. The chemicals then dissolve the developer dye so it begins to diffuse up toward the image layer. The metallic silver areas at each layer -- the grains that were exposed to light -- grab the dyes so they stop moving up.

The chemical component in a traditional camera is film. Essentially, when you expose film to a real image, it makes a chemical record of the pattern of light. It does this with a collection of tiny light-sensitive grains, spread out in a chemical suspension on a strip of plastic. When exposed to light, the grains undergo a chemical reaction.

A camera lens. While light bounces off of objects, it can also pass through objects — but, when it does, it can actually change direction. A camera lens takes all the light rays bouncing around and uses glass to redirect them to a single point, creating a sharp image.

How digital cameras work. Photo: A typical image sensor. The green rectangle in the center (about the size of a fingernail) is the light-sensitive part; the gold wires coming off it connect it into the camera circuit. Digital cameras look very much like ordinary film cameras but they work in a completely different way.

The basic idea of film is to capture patterns of light using special chemicals. The camera briefly exposes the film to the light coming from a scene (typically for a small fraction of a second), and where the light hits the film, it starts off a chemical reaction.

The colors formed in the color negative film are based on the subtractive color formation system. The subtractive system uses one color (cyan, magenta or yellow) to control each primary color. The additive color system uses a combination of red, green, and blue to produce a color. Your television is an additive system.

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