Question

De-broglie wavelength associated with a ball (mass = $132$g) moving with speed of $1000$ m/s is:

$(h=6.6\times {10}^{-34}$J-s$)$

• A. $5\times {10}^{-34}$ m
• B. $2\times {10}^{-34}$ m
• C. $2\times {10}^{-36}$ m
• D. $5\times {10}^{-39}$ m

Answer 1

The correct option is D $5\times {10}^{-39}$ m

m = $132g$

speed = $1000m/s$.

$h=6.6\times {10}^{-34}$ J/s

$\lambda =\frac{h}{mv}$

$\lambda =\frac{6.6\times {10}^{-34}}{132\times 1000}$

$\lambda =5\times {10}^{-39}$

$\therefore$ D is correct option.