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The wavelength $ \lambda$ associated with a moving electron depends upon its mass m, velocity v, and Planck’s constant h. For a dimensionless constant k, the dependence of $ \lambda$ on m, v, and h is written as

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$ \lambda = k \large\frac{h}{mv}$
Hence (D) is the correct answer.
answered Jun 3, 2014 by thanvigandhi_1

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