The work function of a metal is 4 eV. Threshold wavelength is: (hc = 12400 eV·Å)

In Bohr model, the radius of nth orbit is proportional to:

Photoelectric effect demonstrates:

The energy of electron in hydrogen atom's ground state is:

Stopping potential in photoelectric effect is independent of:

The wavelength of Balmer series limit of hydrogen is:

de Broglie wavelength of an electron accelerated through V volts is:

The number of spectral lines from n = 4 to ground state of hydrogen:

If frequency of incident radiation is doubled, maximum kinetic energy of photoelectrons:

Angular momentum of electron in nth orbit of hydrogen is:

Lyman series of hydrogen lies in which region?

In photoelectric effect, the saturation current depends on:

The ratio of radii of first and second Bohr orbits is:

The ionization energy of hydrogen atom is:

Davisson-Germer experiment confirmed:

The speed of electron in first Bohr orbit of hydrogen is: (in terms of c)

Which phenomenon cannot be explained by wave theory of light?

The ratio of energies of photons of wavelength 2000 Å and 4000 Å is:

In hydrogen atom, the transition from n = 3 to n = 1 produces:

The photon has zero: