Physics
JAMB 1999
An astronomical telescope is said to be in normal adjustment when the
-
A.
eye is accommodated
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B.
focal length of objective lens is longer than that of eye piece
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C.
final image is at the near point of eye
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D.
final image is at infinity
Correct Answer: Option D
Explanation
An astronomical telescope is in normal adjustment when the final image is at infinity. This means:
a) Eye is relaxed (no accommodation)
b) Image from objective is at focal point of eyepiece
c) Maximum comfortable magnification for distant viewing
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