What is the de-Broglie wavelength associated with
a ball of mass 150 g travelling at 30 m/s ?
(Take , `h = 6 . 63 xx 10 ^(-34)` J-s )

Explanation

Since , we know de-Broglie wavelength of a particle moving with velocity v and mass is m ,br> `:.` de-Broglie wavelength ` lambda = (h)/( mv)`
For ball,
`lambda_(b) = (h)/( m_(b) v_(b)) = (6.63 xx 10 ^(-34))/( 150 xx 10 ^(-3) xx 30)`
`= 1. 47 xx 10 ^(-34)m`