The focal length of an objective of a telescope is 3M and diameter 15 centimetre assuming for normal, diameter of The Pupil is 3 millimetre for its complete use focal lengthof eyepiece must be
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even i have the same question can anyone verify
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telescope is 3 metre and diameter 15 cm. Assuming for a normal eye, the diameter of the pupil is 3 mm for its complete use, the focal length of eye piece
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