In a Young's double-slit experiment, at a certain point on the screen the path difference between the two interfering waves is 18 of a wavelength. The ratio of the intensity of light at that point to that at the center of a bright fringe is closest to:

Which of the following events is considered a major turning point that fueled Indian nationalism during British rule due to its brutal nature and widespread condemnation?

Which of the following events is considered the first major peasant uprising against the British in India?

Who led the Non-Cooperation Movement in India?