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end of unit revision - Coggle Diagram
end of unit revision
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usefulness of hex 1. Easier to write numbers less space because Binary is 11010100 is D4 in hex 2. they are short and easier to remember 3. Shorter to write and takes up less storage
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to convert sound samples of the amplitude of the wave are taken at regular intervals. The amplitude can only take certain values depending on the bit depth
how to calculate hex B is 11 in denary so we multiply 11x16 because we are dealing with base 16.then we add 9 to our calculation (11x16)=9=176+9=182
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the more pixels on a screen the higher the resolution and the better the quality the picture will be but the higher the image resolution the more memory is needed to store the graphic.
the colour depth of an image is measured in bits. the number of bits indicates how many colours are available for each pixel. in a black and white image only 2 colours are needed so the image has a colour depth of 1 bit
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