Question

The wavelength associated with a golf weighing $200g$ and moving at a speed of $5m/h$ is of the order:

• A. ${10}^{-10}m$
• B. ${10}^{-20}m$
• C. ${10}^{-30}m$
• D. ${10}^{-40}m$

Answer 1

The correct option is C ${10}^{-30}m$

Velocity $u=5m/h=\frac{5}{3600}m/s$
Expression for de Broglie's wavelength is written as
$\lambda =\frac{h}{mv}=\frac{6.62\times {10}^{-34}J.s}{200\times {10}^{-3}kg\times \frac{5}{3600}m{s}^{-1}}=2.383\times {10}^{-30}m$