Atoms Test - 41...

White light is passed through sodium vapours contained in a thin walled glass flask and the transmitted light is examined with the help of a spectrometer. The spectrum so obtained is.

If $$E_P$$ and $$E_k$$ represent potential energy and kinetic energy respectively, of an orbital electron, then according to Bohr's theory:

If the minimum energy of photons needed to produce photoelectric effect is 3eV, bombarding the photoelectric material by a number of photons of 2.5eV also one can get

When a beam of white light is passed through sodium vapours and then through a spectrometer, spectrum so obtained has two dark lines present in the yellow region. This spectrum is called

 In the hydrogen atom an electron is moving in nth orbit. The circumference s of the orbit and the de Broglie wavelength, of the moving electron are related by the equation

If the electron in the hydrogen atoms is excited to n = 5 state, the number of frequencies present in the radiation emitted is :

Radius of the second Bohr orbit of a singly ionised helium atom is

The wave length of K-ray line of an anti cathode element of atomic number Z is nearly proportional to:

Linear momentum of an electron in Bohr orbit of H-atom (principal quantum number $$n$$) is proportional to :

When electron in hydrogen atom jumps from second orbit to first orbit, the wavelength of radiation emitted is $$\lambda$$. When electron jumps from third orbit to first orbit, the wavelength of emitted radiation would be