Question

Show that the wavelength of a 150gm rubber ball travelling at the velocity of 50m/s is short enough to be observed.

Answer 1

$\huge{\mathfrak{\red{\underline{\underline{Solution:-}}}}}$

Given:-

$\sf{Mass\;of\;rubber\;ball=150\;g=0.15\;kg}$

$\sf{Velocity=50\;m/s}$

$\sf{\lambda = \dfrac{h}{mv}}$

$\sf{\lambda=\dfrac{6.626\times 10^{-34}}{0.15\times 50}}$

$\sf{=0.883\times 10^{-34}\;m}$

As de broglie concept is valid only for microscopic particles So, a mass of 150 g has almost negligible wavelength.