question_answer

Two particles move at right angle to each other. Their de-Broglie wavelengths are and  respectively. The particles suffer perfectly inelastic collision. The de-Broglie wavelength , of the final particle, is given by : [JEE Main 8-4-2019 Morning]

A)

B)

C)

D)

Correct Answer: D

Solution :

[d]

&

Using momentum conservation