. A particle A of mass m and initial velocity v collides with a particle B


of mass m/2 which is at rest. The collision is head on, and elastic. The ratio of the de-Broglie wavelengths after the collision is

was

Best Answer

Ans :B

Sol: As given that the collision is elastic, so both kinetic energy and momentum of the system remains the same. 

was

According to the conservation of linear momentum, the sum of momenta of the particles before the collision is equal to the sum of momenta of the particles after the collision.
 

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