The de Broglie wavelength associated with a ball of mass `1kg` having kinetic enegry `0.5J` is

Options

A. `6.626xx10^(-34)` m
B. `13.20xx10^(-34)` m
C. `10.38xx10^(-21)` m
D. `6.626xx10^(-34)Å`

Answer

A

Explanation

`1/2mv^(2)=0.5" J ,"m=1" kg"`
`v^(2)=1" or "v=1" m/s"`
`lamda=h//mv=(6.626xx10^(-34))/(1xx1)=6.626xx10^(-34)m`