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Question: Answered & Verified by Expert
A $0.66 \mathrm{~kg}$ ball is moving with a speed of $100 \mathrm{~m} / \mathrm{s}$. The associated wavelength will be (h $\left.=6.6 \times 10^{-34} \mathrm{Js}\right)$
ChemistryStructure of AtomJEE Main
Options:
  • A $6.6 \times 10^{-32} \mathrm{~m}$
  • B $6.6 \times 10^{-34} \mathrm{~m}$
  • C $1.0 \times 10^{-35} \mathrm{~m}$
  • D $1.0 \times 10^{-32} \mathrm{~m}$
Solution:
1414 Upvotes Verified Answer
The correct answer is: $1.0 \times 10^{-35} \mathrm{~m}$
From de-Broglie equation,
$$
\lambda=\frac{\mathrm{h}}{\mathrm{mv}}=\frac{6.6 \times 10^{-34}}{0.66 \times 100}=10^{-35} \mathrm{~m}
$$

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