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Matter Waves

A ball of mas...

Question

A ball of mass 0.12 kg is moving with a speed 20 m/s. Calculate the de Broglie wavelength. (Planck constant $h = 6.62 \times 10^{- 34} J . s$ )

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Solution

The de-broglie wavelength of a moving object is of mass $m$ with speed $v$ is given as
$λ = \frac{h}{m v}$

$= \frac{6.62 \times 10^{- 34} J . s}{0.12 k g \times 20 m / s}$

$= 2.7583 \times 10^{- 34} m$

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