Question

The de Broglie wavelength of a particle with mass 1 gm and velocity 100 m/s is:

• A. $6.63\times {10}^{-33}m$
• B. $6.63\times {10}^{-34}m$
• C. $6.63\times {10}^{-35}m$
• D. $6.635\times {10}^{-35}m$

Answer 1

The correct option is A $6.63\times {10}^{-33}m$

$momentum=\frac{1}{1000}Kg\times 100m/s$
$\lambda =\frac{h}{P}=\frac{6.6\times {10}^{-34}J/s}{{10}^{-1}}$
$=6.6\times {10}^{-33}m$