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CBSE Class 12 · 2007 · Modern PhysicsVery Short Answer

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An electron, an alpha-particle and a proton have the same kinetic energy. Which one of these particles has the largest de-Broglie wavelength?

Answer: Electron (smallest mass).

Solution

For a particle of kinetic energy ,

For equal , the lightest particle has the largest wavelength. The electron is the lightest.

CBSE Class 12 Board · 2007 · Subjective

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