In He-Ne laser the lasing action is produced byPhysics A. Ne only B. He-Ne both C. Electrons of He D. Electrons Ne
Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60km/h and the other is moving at 40km/h mph. In how many hours will they meet?
The most fundamental of all sciences which provides basic principles and fundamental laws to other branches of science is
