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

Kinetic energy `(1)/(2)mv^(2)`
[m = mass v= velocity]
or, `0.5=(1)/(2)xx1xx v^(2), or, v=1 ms^(-1)`
de Brogile wavelenght `lambda=(h)/(hv)`
or `lambda=(6.626xx10^(-34))/(1 kg xx1 ms^(-))= 6.626xx10^(34)` m