If `lambda_(1)` and `lambda_(2)` are the wavelength of characteristic `X` - rays and gamma rays respectively , then the relation between them is

If lambda_v, lambda_x and lambda_m represents the wavelength of visible light X-ray and microwave respectively then :

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