Calculate the separation between the particles of a systemin the ground state, the corresponding binding energy and wavelength of first line in Lyman series of such a system is positronium consisting of an electron and positron revolvin ground their common centre.

The positronium consisting of an electron and a positron corresponding binding energy and wavelength of first line in Lyman series of such a system.

Calculate the separation between particles, the binding energy and the wave-length of the first line of the Kyman series of a mesonic hydrogen (i.e an atom consisting of a proton +a revolving meson in place of an electron). Mass of a meson =207 times mass of electron and charge of meson = charge of electron.

A mu-meson ("charge -e , mass = 207 m , where m is mass of electron") can be captured by a proton to form a hydrogen - like ''mesic'' atom. Calculate the radius of the first Bohr orbit , the binding energy and the wavelength of the line in the Lyman series for such an atom. The mass of the proton is 1836 times the mass of the electron. The radius of the first Bohr orbit and the binding energy of hydrogen are 0.529 Å and 13.6 e V , repectively. Take R = 1.67 xx 109678 cm^(-1)

Calculate the radius of the first Bohr orbit of a He^(+) ion and the binding energy of its electron in the ground state.

Find the binding energy of an electron in the ground state of hydrogen-like ions in whose spectrum the third line of the Balmer series is 120 nm .

The electron present in 5th orbit in excited hydrogen atoms returned back to ground state. The no. of lines which appear in Lyman series of hydrogen spectrum