Calculate the frequency and wave number of`H_a` line of Balmer series in hydrogen spectrum.

State the name of the visible series in hydrogen spectrum?

Calculate the wavelength, frequency and wave number of a light wave whoce periods is 2.0 xx 10^-10 s .

Find the shortest wavelength of the Paschen series, given that the longest wavelength of the Balmer series in the hydrogen spectrum is 6563 A^@ .

The wave number of first line in Balmer series of hydrogen spectrum is (Rydberg constant, R_H = 109,678 cm^-1 ) nearly

Calculate the wavelength of the first three lines in Paschen series of hydrogen atom.

Calculate the wavelengths of the first three lines in Paschen series of hydrogen atom.

Calculate the wavelength of the first line of Paschen series of hydrogen atom.

Calculate the oxidation number of : P in H_3 PO_4 .

Find the shortest and longest wavelength of spectral line in the Balmer series of the hydrogen atom.