Physics

Problem

A particle A of mass

m

and initial velocity

v

collides with a particle B of mass

\frac{m}{2}

which is at rest. The collision is head on, and elastic. The ratio of the de-Broglie wavelengths

\lambda_A

\lambda_B

after the collision is [Main 2017] (a)

\frac{\lambda_A}{\lambda_B} = \frac{2}{3}

(b)

\frac{\lambda_A}{\lambda_B} = \frac{1}{2}

(c)

\frac{\lambda_A}{\lambda_B} = \frac{1}{3}

(d)

\frac{\lambda_A}{\lambda_B} = 2