Question

The de Broglie's wavelength of a tennis ball of mass 60 gm moving with a velocity of 10 metres per second is appoximately:

• A. ${10}^{-31}m$
• B. ${10}^{-16}m$
• C. ${10}^{-25}m$
• D. ${10}^{-33}m$

Answer 1

The correct option is D ${10}^{-33}m$

Expression for de Broglie's wavelength is written as $\lambda =\frac{h}{mu}=\frac{6.62\times {10}^{-34}J.s}{60\times {10}^{-3}kg\times 10m{s}^{-1}}=1.103\times {10}^{-33}m$.