The experience of Frank and Hertz (1977)

Crushed stone is loaded at the port.

Large-the periodic table.

The model of the atom.

Experience with irradiation of an atom with alpha particles.

Rutherford's model of the atom.

Large-chaotic motion of particles.

Planck's hypothesis about quanta.

Portrait of Niels Bohr.

Bohr's theory of the structure of the atom.

The first postulate about stationary states.

The second postulate is the frequency conditions.

Bohr's idea of the discreteness of the state of atoms.

Equipment in the physical office - the girl conducts an experiment.

Spectral series.

The line of the Balmer series at hydrogen.

The girl works with devices and special equipment for physical experiments and experiments.

Experience with mercury atoms.

The experience of Frank and Hertz.

Large-the device is a voltmeter.