The de Broglie wavelength associated with a ball of mass 200 g and moving at a speed of 5 metres/hour, is of the order of (`h = 6.625xx10^(-34)`J s) is

Options

A. `10^(-10)m`
B. `10^(-20)m`
C. `10^(-30)m`
D. `10^(-40)m`

Answer

C

Explanation

The de Broglie wavelength is
`lambda= (h)/(mv) = ((6.26 xx 10^(-34) J s))/((0.200 kg){5m//(60 xx 60 s))}`
`= 2.4 xx 10^(-30)m`