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Resonance fluorescence is demonstrated by illuminating a
sodium vapour with white visible light. The emitted light is
spectrally analyzed and shows the emission spectrum of sodium.
Therefore the same atomic levels are involved in both
absorption and emission.
The stream of particles emitted from a radioactive source diminishes over time. A radioactive substance decays according to certain physical laws. In the special case of a radioactive substance comprising only one irradiating component, the quantity of material diminishes ...
A Mach-Zehnder-interferometer is illuminated with a laser beam.
Circular interference fringes appear on the screens behind the
interferometer. If polarisation filters with opposite polarisation
planes are placed in the two interferometer paths the interference
patterns disappear. ...
The distribution of intensity in the Fraunhofer diffraction pattern of a slit is measured. The results are evaluated both from the wave pattern view point, by comparison with Kirchhoff's diffraction formula, and from the quantum mechanics standpoint to confirm Heisenberg's uncertainty ...
The intensity distribution in the Fraunhofer diffraction pattern
of a slit is measured. Measurement results are evaluated both in
the wave representation through comparison with Kirchhoff's
diffraction fromula and in the photon representation, in order to
verify Heisenberg's ...
Charged oil droplets subjected to an electric field and to gravity between the plates of a capacitor are accelerated by application of a voltage. The elementary charge is determined from the velocities in the direction of gravity and in the opposite direction.
Electrons are accelerated in an electric field and enter a
magnetic field at right angles to the direction of motion. The
specific charge of the electron is determined from the accelerating
voltage, the magnetic field strength and the radius of the ...
Electrons are accelerated in a tube filled with mercury vapour.
The excitation energy of mercury is determined from the distance
between the equidistant minima of the electron current in a
variable opposing electric field.
Electrons are accelerated in a tube filled with neon vapour. The
excitation energy of neon is determined from the distance between
the equidistant minima of the electron current in a variable
opposing electric field.
A photocell is illuminated with monochromatic light of different
wavelengths from a filament lamp with interference filters. The
maximum energy of the ejected electrons in the photo-cell
depends only on the frequency of the incident light, and is
independent of its ...
The photoelectric effect is one key experiment in the development of modern physics. White light from a filament lamp is filtered by a grating spectrometer and illuminates a photocell. The maximum energy of the ejected electrons depends only on the frequency of the incident light, and ...
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