The de-Broglie wavelength of a tennis ball mass ` 60 g` moving with a velocity of ` 10 m` per second is approximately :

Options

A. `10^(-33)` metres
B. `10^(-31)` metres
C. `10^(-16)` metres
D. `10^(-25)` metres

Answer

A

Explanation

`m = 60 g =6 xx 10^(-2) kg, v = 10 ms^(-1)`
`lambda = (h)/(mv) = (6.6 xx 10^(-34) kgm^(2) s^(-1))/((6 xx 10^(-2) kg) xx (10 ms^(-1)))`
`1.1 xx 10^(-33) m ~~ 10^(-33) m`