Explanation Formula used: Write the expression for average kinetic energy ( K ) . K = p 2 2 m (1) Here, p is momentum of photon, and m is mass of photon. Write the expression for photon momentum. p = h λ (2) Here, λ is de Broglie wavelength and h is Planck’s constant, which is 6.63 × 10 − 34 J ⋅ s . The average kinetic energy remains same for rubidium and sodium atom, since the temperature is same

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 7P

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To explain: The comparison of de Broglie wave lengths of typical atoms in the two gases.

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College Physics: A Strategic Approach (3rd Edition)

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The comparison of de Broglie wave lengths of typical atoms in the two gases.

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