Multiple Choice
The pupil of the human eye is approximately 0.8 centimetres in diameter when adapted to the dark.What is the ratio of the light-gathering power of a 1.6 metre telescope to that of the human eye?
A) 2 : 1
B) 20 : 1
C) 400 : 1
D) 40,000 : 1
Correct Answer:
Verified
Correct Answer:
Verified
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