If the radius of first second third and thurth orbit of hydrogen atom are `r_(1),r_(2),r_(3) and r_(4)` respectively .Then their current increases order will be

Options

A. `r_(4)` `lt`` r_(3)` `lt` `r_(2)` `lt``r_(1)`
B. `r_(1)` `lt` `r_(2)` `lt` `r_(3)` `lt``r_(4)`
C. `r_(4)` `lt` `r_(3)` `lt` `r_(2)` `gt``r_(1)`
D. Equal in all

Answer

`r_(1)` `lt` `r_(2)` `lt` `r_(3)` `lt``r_(4)`

Explanation

`r = n^(2)`
`r_(1)` lt r_(2)` lt `r_(3)` lt`r_(4)`