Placing a small 45° mirror in the path of the light from the objective mirror in a reflecting telescope (as Newton did) does all of the following except one. Which one is not a consequence of this method?
A) It makes the telescope easier to use compared to a prime focus.
B) It introduces the possibility of distortion in the secondary mirror.
C) It decreases the amount of light reaching the objective mirror.
D) It causes a blank spot in the image where the beam has been interrupted by the secondary mirror.
Correct Answer:
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Q27: A Newtonian telescope uses:
A)two curved mirrors.
B)several mirrors,
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Q30: The prime focus cage of a telescope
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