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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
Typically, only about 1% of the light that hits a photographic plate from a telescope is actually used to record an image. The rest of the light is lost due to reflection, absorption, and other inefficiencies in the system. Innovations like digital sensors in modern telescopes have increased this efficiency significantly.
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