Home Physics Electron, Photon, Photoelectric Effect and X-rays Hard A particle of mass at rest decays into two …
Physics Electron, Photon, Photoelectric Effect and X-rays Hard MCQ (Single Correct)

A particle of mass at rest decays into two particles of masses and , having non-zero velocities. The ratio of the de-Broglie wavelengths of the particles, is

A
B

C
1.0
D

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The correct answer is:
C

From law of conservation of momentum,
(in opposite directions)
Now de-Broglie wavelength is given by , where Planck's constant

Since magnitude of momentum (p) of both the particles is equal, therefore
or

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