JEE Main 2019 Physics question

PhysicsDual Nature of Matter and RadiationJEE Main 2019

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 λ, of the final particle, is given by:

Answer: (B)

Solution

with .

Question ID VK-009218