If `lambda_(1) and lambda_(2)` are the wavelength of the first members of the Lyman and Paschen series, respectively , then `lambda_(1) lambda_(2)` is

If lambda_(1) and lambda_(2) are the wavelengths of the first members of the Lyman and Paschen series respectively, then lambda_(1) : lambda_(2) is

If lambda_(1) and lambda_(2) are the wavelengths of the first members of the Lyman and Paschen series, respectivley, then lambda_(1) : lambda_(2) is

If lambda_(1)= and lambda_(2) are the wavelengths of the first members of Lyman and Paschen series respectively, then lambda_(1): lambda_(2) , is

If lambda_1 and lambda_2 are the wavelengths of the first member of the Lyman and Paschen series respectively, then lambda_1 : lambda_2 is

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

If lambda_(1) and lambda_(2) are the wavelengths of the third member of Lyman and first member of the Paschen series respectively,then the value of λ 1 : λ 2 is:

If lambda_1 and lambda_2 , are the wavelengths of the third member of Lyman and first member of the Paschen series respectively, then the value of lambda_1:lambda_2 is:

In hydrogen atom, if lambda_(1),lambda_(2),lambda_(3) are shortest wavelengths in Lyman, Balmer and Paschen series respectively, then lambda_(1):lambda_(2):lambda_(3) equals