Question

De-broglie wavelength of particle with mass 1gm and velocity 100m/sec is

Answer 1

De-Broglie wavelength is given by l=\frac{h}{mv} , where h is Planck's constant, m mass of the particle and v speed of the particle.

Now, here $m=0.001\;kg,v=100\;m/s$.

The De-Broglie wavelength is

$l=\frac{h}{mv} \\ l=\frac{6.63*10^{-34}}{0.001*100} \\ l=6.63*10^{-33}$

The De-Broglie wavelength is $6.63*10^{-33}\;m$.