Question

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

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

Answer 1

Answer: (C)

${10}^{-30}m$

Given:
Mass of the golf ball $=200g$

Velocity $=5\frac{m}{h}=\frac{5}{3600}$

$\lambda =\frac{h}{mv}=\frac{6.626\times {10}^{-34}}{200\times {10}^{-3}\times 5/3600}=2.3853\times {10}^{-30}m$.

de Broglie wavelength $=2.3853\times {10}^{-30}m$.