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Question 20: If an electron and proton have the same de’ Broglie wavelength, which particle has greater speed?

ANSWER

 De’ Broglie wavelength associated with a moving particle of mass m and velocity v is

Since both wavelengths are equal, therefore,

Mass and velocity are inversely proportional. Since mass of electron is less than the mass of proton, electron will be moving faster than proton.

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