Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
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