Asked by Anonymous
The Hale Telescope has a mirror of diameter 5.1 meters and a focal length of 16.9 meters. The Keck 1 Telescope has a mirror of diameter 10 meters and a focal length of 17.5 meters. Which telescope has a greater light-gathering power (i.e., can collect more photons per second)?
Answers
Answered by
oobleck
since the only light the telescope can gather has to come in through the lens, the larger diameter can gather more light.
The focal length is related to the magnification.
google can provide you with further discussions on these topics.
The focal length is related to the magnification.
google can provide you with further discussions on these topics.
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