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A proton is moving with kinetic energy `5 xx 10^(-27) J`. What is the wavelength of the de Broglie wave associated with it ?

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A proton is moving with kinetic energy `5 xx 10^(-27) J`. What is the wavelength of the de Broglie wave associated with it ?
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Correct Answer - `1.62 xx 10^(-7) m`
Mass of proton `= (1.008 xx 10^(-3))/(6.02 xx 10^(23)) kg = 1.67 xx 10^(-27) kg`
Further proceed as in Solved Problem 3.
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