Compute the associated wavelength of a 0.01eV(~thermal) and a high fission neutron of 10 MeV of kinetic energy. Hint: Ask yourself if you will need to consider relativistic effe…

Question

asked May 21, 2020 142k views

1 Answer

Mirsada · Answer 1 · 2020-05-26T15:24:34+0000

Step-by-step explanation:

It is given that,

1. Energy of neutron,
$E_1=0.01\ eV=0.01* 1.6* 10^(-19)\ J=1.6* 10^(-21)\ J$

The energy of neutron is given by :

$E_1=(hc)/(\lambda_1)$

$\lambda_1=(hc)/(E_1)$

$\lambda=(6.63* 10^(-34)* 3* 10^8)/(1.6* 10^(-21))$

$\lambda_1=1.24* 10^(-4)\ m$

2.
$E_2=10\ MeV=10^7\ eV=1.6* 10^(-19)* 10^7=1.6* 10^(-12)\ J$

The energy of neutron is given by :

$E=(hc)/(\lambda)$

$\lambda_2=(hc)/(E_2)$

$\lambda_2=(6.63* 10^(-34)* 3* 10^8)/(1.6* 10^(-12))$

$\lambda_2=1.24* 10^(-13)\ m$

Hence, this is the required solution.