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What two parts of a camera controls the amount of light reaching the film?
The Shutter and the Aperture are the two controls the Shutter is used to control how long the Film is exposed for and Aperture is used to control how much light is let in
What happens if you been exposed to methamphetamine?
buy as much as you can!
Can burn if exposed to too much ultraviolet light?
Skin
When a x-ray photograph is taken why is it necessary to have the film in a light proof cassette?
Film is light sensitive so any exposure to the film will fog it. Most film comes either in a cassette, as in 35mm or roll-film which is protected by a paper leader and trailer. Professionals also use cut film which is hand loaded in the dark into film holders. Once a film is exposed in the camera it has what is called a latent image. It stays latent until processed. Once all the film is exposed it needs to be processed as soon as possible. Once the film is exposed its sensitivity makes it more susceptible to fogging and therefor must be protected from light. In the case of 35 mm and 120 roll film it shouldn't be much of a problem as the film is protected by the cassette or the backing paper. Once the film is taken out of its protection it has to be in total darkness. Colour film is sensitive to all colours and light. Monochrome film is what is called panchromatic. This means that although the film is mono it still records colours as grey tones so it must be handled in complete darkness. Black and white papers as used for monochrome prints are sensitive to only certain colours of the visible spectrum so can be viewed under dim yellow light. Blue light would fog the paper which is why in a black and white darkroom yellow filters are used for processing paper prints.
What is exposed photography?
When someone talks about exposure in photography, they're talking about the level of light in an image. A photograph can be overexposed (too much light), underexposed (not enough light) or well exposed (the light is just right).
Why are x rays black and white?
The x-ray image is formed when the x-rays travel through the patient onto the cassette. The x-ray cassette is made with a Gelatin, bariums, and crystals the light up when interacted with x-rays. Depending on how much of the x-ray is absorbed by your body, the cassette will light up in different brightnesses, causing certain parts of the film to become slightly exposed. A fully exposed x-ray film will appear black will appear black when processed, while one the hasn't been exposed in any light will show be very light, and only show the color of the film, which has a slight tint, and a properly used x-ray film will show black, white, and different shades of gray depending on the thickness of bones, and tissue mass.
Why are X-rays black and white?
The x-ray image is formed when the x-rays travel through the patient onto the cassette. The x-ray cassette is made with a gelatin, bariums, and crystals the light up when interacted with x-rays. Depending on how much of the x-ray is absorbed by your body, the cassette will light up in different brightnesses, causing certain parts of the film to become slightly exposed. A fully exposed x-ray film will appear black will appear black when processed, while one the hasn't been exposed in any light will show be very light, and only show the color of the film, which has a slight tint, and a properly used x-ray film will show black, white, and different shades of gray depending on the thickness of bones, and tissue mass.
What is the purpose of wearing a film badge when working with ionizing radiation sources?
The film badge measures radiation exposure; an exposed film badge indicates how much radiation a worker has recieved.
What is the effect of light on photosensitive film?
Too much light on photosensitive film can cause the picture to immediately corrode. This is why many photographers use a darkroom.
How is an x-ray film produced?
X ray film was produced much like the film for visible light. Silver halide suspensions were spread on the backing material.
Can be photosynthesis carried out using light from a torch light explain?
Yes, but as the light intensity is much lower the rate at which it happens is also much lower.
Why do people working around radioactive waste in a radioactive storage facility wear badges that contain strips of photographic film?
The film in the badges changes colour when radiation hits it. By looking at the badges, the people wearing them can tell how much radiation they have been exposed to. They have different strips of film for different types of radiation, so they are not only able to tell how much radiation someone has been exposed to, but also what type of radiation. Its basically a safety measure to ensure that workers are not exposed to excessive levels of radiation emitted from the waste.
