The angular width θ of a distant star is measured by a Michelson radiofrequency stellar interferometer. The distance h between the reflectors is increased until the interference fringes vanish for the first time. This happens at h = 3 m for a star emitting radiowaves of wavelength 2.7 cm. The measured value of θ (in degrees) is closest to

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?