Consider an atom made up of a protons and a hypothetical particle of triple the mass of electron but having same charge as electron. Apply bohr model and consider all possible transition of this hypothetical from second excited state to lower states.The possible wavelengths emitted is (are) (given in term of the Rydberg constant R fr the hydrogen atom)

Options

A. `(8)/(5R)`
B. `(3)/(8R)`
C. `(4)/(9R)`
D. `(12)/(5R)`

Answer

B, C, D

Explanation

Ryberg `prop` mass of electron.
`(1)/(lamda)=3R[(1)/(n_(2))-(1)/(3^(2))]n=1,2implies(1)/(lamda)=3R[(1)/((1))-(1)/(9))]`
`(1)/(lamda_(2))=3R[(1)/((2)^(2))-(1)/(9)]implies(1)/(lamda_(3))=3R[(1)/((1)^(2))-(1)/((2)^(2))]`