If the electron in a hydrogen atom jumps from an orbit with level n₂ = 3 to an orbit with level n₁ = 2, the emitted radiation has a wavelength given by 

The ionization energy  of hydrogen atom is 13.6 eV.  Following Bohr’s theory, the energy corresponding to a transition between 3^rd and 4^th orbit is

The spectrum obtained from a sodium vapour lamp is an example of

If 13.6 eV energy is  required to ionize the hydrogen atom, then the energy required to remove an electron from n = 2 is

The energy required to excite hydrogen atom from n = 1 to n = 2 state is 10.2 eV. What is the wavelength emitted  when it returns to ground state? 

In the Bohr’s model of a hydrogen atom, the centripetal force is furnished by the Coulomb attraction between the proton and the electron. If a₀ is the radius of the ground state orbit, m is the mass and e is the charge on the electron, ε₀ is the vacuum permittivity, the speed of the electron is

Which source is associated with a line emission spectrum?

The total energy of electron in the ground state of hydrogen atom is -13.6 eV. The kinetic energy of an electron in the first excited state is

In a Rutherford scattering experiment when a projectile of charge Z₁and mass M₁ approaches a target nucleus of charge Z₂ and Mass M₂, the distance of closest approach is r₀. The energy of the projectile is