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What percentage of the light falling on a typical photographic plate from a telescope is actually used to record an image on this plate?
Wiki User
∙ 11y ago
Unfortunately, photographic film is not a very efficient light
detector. Only about 2% of the light striking photographic film is
able to trigger the chemical reaction needed to produce an image.
Thus, roughly 98% of the light falling onto photographic film is
wasted.
Wiki User
∙ 11y ago
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