The de Broglie wavelength related to a body of mass 50g moving at the speed of 72 km / hr has the order of magnitude as `10^(x)` m. Find the value of 'x'.
(Take `h = 6. 626 xx 10 ^(-34) Js`)

Answer

`33.00`

Explanation

`v = 72 km//hr`
`=72 xx (5)/(18) m//s`
`= 20 m//s`
Using,
`lamda = ( h)/(mv) = ( 6.626 xx 10 ^(-34))/( 0.05 xx 20) = 6.626 xx 10 ^(-34)`
`= 0.6626 xx 1 0^(-33) m`