Question

A $0.66\, kg$ ball is moving with a speed of $100 \,m/s$. The associated wavelength will be $(h = 6.6 \times 10^{-34} \, Js)$

• A. $ 6.6 \times 10^{-34} m $
• B. $ 1.0 \times 10^{-35} m $
• C. $ 1.0\times 10^{-32} m $
• D. $ 6.6 \times 10^{-32} m $

Answer 1

Answer: (B)

From de-Broglie equation,
$\lambda = \frac{h}{mv} = \frac{6.6 \times 10^{-34}}{0.66 \times 100} = 10^{-35} m $