What change in the spectrum would you see on the screen if a green filter was in the way
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The other colours (wavelengths) of the spectrum are absorbed. Similarly, a green filter only allows green light through. This is called colour by subtraction. So when, for example, a red filter is placed in front of the spectrum above only the red part of the spectrum remains - the rest disappears.
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The other colours (wavelengths) of the spectrum are absorbed. Similarly, a green filter only allows green light through. This is called colour by subtraction. So when, for example, a red filter is placed in front of the spectrum above only the red part of the spectrum remains - the rest disappears.
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