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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
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Ghost.
The capacity of an optical system to resolve point objects as separate images. Limit of human is different in day and night because size of pupil varies , so it is aroung 50 second arc angle in a day for V-band wavelength 0.55micro meter. read following article for more clarification https://www.wikilectures.eu/w/Resolution_of_human_eye