Question

A cricket ball of 0.5 Kg is moving with a velocity of 100m/s. The wavelength associated with its motion is:

• A. $1/100m$
• B. $6.6\times {10}^{-34}m$
• C. $1.32\times {10}^{-35}m$
• D. $6.6\times {10}^{-28}m$

Answer 1

Answer: (C)

$1.32\times {10}^{-35}m$

$\lambda =\frac{h}{P}$
$p=mv=0.5Kg\times 100m/s$
$\lambda =\frac{6.626\times {10}^{-34}J/s}{0.5Kg\times 100m/s}$
$=1.32\times {10}^{-35}m$