The ratio of intensities at two points on a screen in Young's double-slit experiment when waves from the two slits have path differences of λ4 and λ6 is: (Given cos 90° = 0, cos 60° = 0.5)

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?