1.

If , lambda_(1) and lambda_(2)are the wavelength of thenumbers of the Lyman and Paschen seri respectively. Then lambda_(1):lambda_(2)=.....

Answer»

`1:3`
`7:50`
`1:30`
`7:108`

SOLUTION :`(1)/(lambda_(1))=R[(1)/(1^(2))-(1)/(2^(2))]=R[1-(1)/(4)]=(3R)/(4)`
`:.lambda_(1)=(4)/(3R)....(1)`
`(1)/(lambda_(2))=R[(1)/(3^(2))-(1)/(4^(2))]`
`=R[(1)/(9)-(1)/(16)]=R[(7)/(144)]`
`:.lambda_(2)=(144)/(7R)...(2)`
`:.(lambda_(1))/(lambda_(2))=((4)/(3R))/((144)/(7R))`
`:.lambda_(1):lambda_(2)=(7)/(108)`


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