Atomic Spectra

The wavelength of the first spectral line in the Balmer series of hydrogen atom is . The wavelength of the second spectral line in the Balmer series of singly ionized helium atom is

A particle of mass m moves in circular orbits with potential energy V(r)= Fr, where F is a positive constant and r is its distance from the origin Its energies are calculated using the Bohr model If the radius of the particle's bit is denoted by R and its speed and energy are denoted by v and E, respectively, then for the orbit (here h is the Planck's constant)

A particle of mass moves in circular orbits with potential energy , where is a positive constant and is its distance from the origin. Its energies are calculated using the Bohr model. If the radius of the particle's orbit is denoted by and its speed and energy are denoted by and , respectively, then for the orbit (here is the Planck's constant)