Question

A particle having a de Broglie wavelength of 1.0 $A^0$ is associated with a momentum of (given $h=6.6\times {10}^{-34}$ Js)

• A. $6.6\times {10}^{-26}kg$ m/s
• B. $6.6\times {10}^{-25}kg$ m/s
• C. $6.6\times {10}^{-24}kg$ m/s
• D. $6.6\times {10}^{-22}kg$ m/s

Answer 1

The correct option is C $6.6\times {10}^{-24}kg$ m/s

Momentum of a particle with given de Broglie wavalength
$=\frac{h}{\lambda }$

$=\frac{6.6\times {10}^{-34}}{1\times {10}^{-10}}$
$=6.6\times {10}^{-24}kgm/s$

So, the answer is option (C).