In a Young's double slit experiment, the slits are separated by 0.3 mm and the screen is 1.5 m away from the plane of the slits. If the distance between the fourth bright fringes on both sides of the central bright fringe is 2.4 cm, find the frequency of the light used (in 1014 Hz).

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?