Black and white photography mainly depends upon the light sensitive material that helps in forming such contrasting images. That material is AgBr. When exposed to AgBr, the image then forms on the film.
While the image is developing, sodium sulphate, an oxidised reducing agent converts the AgBr remains into visible metallic surface.
A system with an input x(t) and out y(t) is described by the relation y(t) = t.x(t). This system is
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Black and white, actually gray scale, photographic images can be produced digitally or chemically. B/W film and prints result from chemicals applied to a surface which react to light. That surface is typically paper or film but could be applied to metal, wood or other materials. Digital B/W images are produced by computer algorithms that convert signals from sensors into images that appear on a computer screen. Hard copy prints can be ink or toner applied to paper or other surfaces. Digital images can also be reproduced using chemical processes.
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Write a reaction which is used in black and white photography?
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Originally Answered: What reaction is used to give black and white photography?
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