In Bohr 's model of hydrogen when an electron jumps from n=1 to n=3 how much energy will be abosrbed

Options

A. `2.15xx10^(-11)` erg
B. `0.1911xx10^(-10)` erg
C. `2.389xx10^(-12)` erg
D. `0.239xx10^(-10)` erg

Answer

B

Explanation

According to Bohr's model `DeltaE=E_1-E_3`
`=2.179xx10^(-11)-(2.179xx10^11)/9`
`=8/9xx2.179xx10^(-11)=1.91xx10^(-11)=0.191xx10^(-10) ` erg
Since electron is going from n=1 to n=3 hence energy is absorbed