The distance between 4^(th) and 3^(rd) B...

The distance between `4^(th) and 3^(rd)` Bohr orbits of `He^(+)` is :

A

`2.645xx10^(-10)m`

B

`1.322 xx 10^(-10)m`

C

`1.851xx10^(-10)m`

D

`2.33 xx 10^(-10)m`

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The correct Answer is:

C

`r_(n)=0.529 (n^(2))/(Z) Å, r_(4)-r_(3)=0.529((16)/(2)-(9)/(2))Å=1.851xx10^(-10)m`

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