Question

A $20g$ object is moving with velocity $100m{s}^{-1}$. The de Broglie wavelength (in $m$) of the object is
[Planck's constant $h=6.626\times {10}^{-34}Js$]

• A. $3.313\times {10}^{-34}$
• B. $6.626\times {10}^{-34}$
• C. $3.313\times {10}^{-31}$
• D. $6.626\times {10}^{-31}$

Answer 1

Answer: (A)

$3.313\times {10}^{-34}$

$\lambda =\frac{h}{m\times v}$

$\lambda =\frac{6.626\times {10}^{-34}}{20\times {10}^{-3}\times 100}=3.313\times {10}^{-34}$.