Saved Bookmarks
| 1. |
The wavelength of the first spectral line of the Lyman series is lambda then the wavelength of the first spectral line of the Paschen series is .........lambda |
|
Answer» <P>`(108)/(7)` `(1)/(lambda_(L))=R[(1)/(1^(2))-(1)/(n^(2))]=R[(1)/(1^(2))-(1)/(2^(2))]=R[(1)/(1)-(1)/(4)]=R[(3)/(4)]` `:. lambda_(L)=(4)/(3R).....(1)` The wavelength of the first spectral line of the PASCHEN series `(1)/(lambda_(P))=R[(1)/(3^(2))-(1)/(4^(2))]= R[(1)/(9)-(1)/(16)]=R[(7)/(144)]` `:. lambda_(p)=(144)/(7R).....(2)` `:. (lambda_(P))/(lambda_(L))=(144)/(7R)xx(3R)/(4)=(108)/(7) :. lambda_(P)=(108)/(7)xx lambda` |
|