Explanation Given data: The speed of Rubidium atom is 1.0 mm s . Formula used: Write the expression for de Broglie wavelength ( λ ) . λ = h m v (1) Here, m is mass of atom, v is speed, and h is Planck’s constant, which is 6.63 × 10 − 34 J ⋅ s . Consider the expression for mass of 87 Rb ( m ) . m = 87 m P Here, m P is mass of proton, which is 1.67 × 10 − 27 kg . Substitute 1.67 × 10 − 27 kg for m P , m = 87 ( 1.67 × 10 − 27 kg ) = 145.29 × 10 − 27 kg Substitute 145.29 × 10 − 27 kg for m , 6.63 × 10 − 34 J ⋅ s for h , and 1

College Physics: A Strategic Approach (3rd Edition)

3rd Edition

ISBN: 9780321879721

Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field

Publisher: PEARSON

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Chapter P.7, Problem 6P

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The approximate de Broglie wavelength of atom of 87Rb .

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The approximate de Broglie wavelength of atom of 87 Rb .

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