Question

What is the wavelength associated with a tennis ball of mass ${10}^{3}g$ an travelling at a velocity of 6.626 $m{s}^{-1}$ ?
$[h=6.6\times {10}^{-34}Js]$

• A. ${10}^{-34}m$
• B. ${10}^{-31}m$
• C. $6.626m$
• D. $6.626\times {10}^{-31}m$

Answer 1

The correct option is A ${10}^{-34}m$

The wavelength associated with a tennis ball of mass ${10}^{3}g$ and travelling at a velocity of 6.626 $m{s}^{-1}$ is

$\lambda =\frac{h}{mv}=\frac{6.626\times {10}^{-34}Js}{1kg\times 6.626m{s}^{-1}}={10}^{-34}m$