First slide

Bohr Model of the Hydrogen atom.

Question

A neutron have speed u makes head on collision with a hydrogen atom in ground state at rest. Find minimum K.E. of neutron for which no elastic collision is possible

Difficult

A

10.2 eV
B

20.4 eV
C

30.6 eV
D

None of these

Solution

For collision not to be elastic loss in K.E is greater than or equal to minimum exciting energy
$\begin{array}{l} Δ E \geq 13.6-3.4 \\ \frac{1}{2} (\frac{m m}{m + m}) {(u - 0)}^{2} \geq 10.2 \\ \frac{m u^{2}}{4} \geq 10.2 \Rightarrow \frac{K}{2} \geq 10.2 \Rightarrow K \geq 20.4 \end{array}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App