Q. The de-Broglie wavelength of a tennis ball of mass 60g moving with a velocity of 10 m/s is approximately (Planck’s constant, $h = 6.63 \times 10^{- 34}Js$)
A) $10^{- 33}m$
B) $10^{- 31}m$
C) $10^{- 16}m$
D) $10^{- 25}m$
Explanation
(a)
$\lambda = \frac{h}{mv}$
$= \frac{6.63 \times 10^{- 34}}{60 \times 10^{- 3} \times 10}$
$= 1.105 \times 10^{- 33}m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.