PhysicsHard145×since 2002Q6589The de Broglie wavelengths of a proton and an α\alphaα particle are λ\lambdaλ and 2λ2 \lambda2λ respectively. The ratio of the velocities of proton and α\alphaα particle will be :A8:18: 18:1B1:21: 21:2C1:81: 81:8D4:14: 14:1Check answerSkip