Q75 / 225 · JEE Main 2003 · Chemistry

The de Broglie wavelength of a tennis ball of mass $60 \mathrm{~g}$ moving with a velocity of 10 metres per second is approximately

  • A
    $10^{-31}$ metres
  • B
    $10^{-16}$ metres
  • C
    $10^{-25}$ metres
  • Correct answer
    D
    $10^{-33}$ metres Planck's constant, $\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}$.

Solution

$\lambda=\frac{\mathrm{h}}{\mathrm{mv}}=\frac{6.6 \times 10^{-34}}{60 \times 10^{-3} \times 10}=10^{-33} \mathrm{~m}$

Hence, the correct answer is option: 'D'.

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