question_answer

A particle 'P' is formed due to a completely inelastic collision of particles 'x' and 'y' having de-Broglie wavelengths  and  respectively. If x and y were moving in opposite directions, then the de-Broglie wavelength of 'P' is :-              [JEE Main 9-4-2019 Afternoon]

A)

B)

C)

D)

Correct Answer: C

Solution :

[c]

By momentum conservation