Atomic

For experiments on electron spin resonance in conjunction with the ESR control unit (514 57) or the ESR adapter (514 56).

Designed for qualitative and quantitative investigations of electron beams in electric and magnetic fields as well as for the determination of the charge-to-mass ratio e/m of the electron and also for measuring the electron velocity v.

For generation of a homogeneous magnetic field for the e/m determination with the fine beam tube (555 571). The holder supports the fine beam tube and provides the electrical connections to the tube. A measuring device with mirror and two riders for measuring the diameter of the electron beam...

Narrow Electron Beam Tube The specific electron charge e/m can be determined quantitatively with this tube. A spherical chamber contains an electron beam system consisting of an indirectly heated oxide cathode, a perforated anode, and a Wehnelt cathode. The chamber also contains neon at a...

KA6021 Helmholtz Coils These coils can be used to produce a highly uniform magnetic field. Two single coils of 124 turns each, 29.5 cm in diameter, are arranged parallel to each other and 150 mm apart. The coils are wound with varnished copper wire, 1.5 mm in diameter.

The Franck-Hertz experiment, (1913, Nobel Prize 1926), with the well defined periodic and equidistant minima and maxima of the collector electrode current, is undoubtedly one of the most impressive experiments to demonstrate and verify the quantum theory. In these demonstrations, it is possible...

For demonstrating that free electrons colliding with mercury atoms emit energy in quantized packets and for determining the excitation energy of the (61S0 – 63P1) resonance line in mercury at 4.9 eV.

The Franck-Hertz experiment, (1913, Nobel Prize 1926), with the well defined periodic and equidistant minima and maxima of the collector electrode current, is undoubtedly one of the most impressive experiments to demonstrate and verify the quantum theory. In these demonstrations, it is possible...

The Franck-Hertz experiment, (1913, Nobel Prize 1926), with the well defined periodic and equidistant minima and maxima of the collector electrode current, is undoubtedly one of the most impressive experiments to demonstrate and verify the quantum theory. In these demonstrations, it is possible...

The Franck-Hertz experiment, (1913, Nobel Prize 1926), with the well defined periodic and equidistant minima and maxima of the collector electrode current, is undoubtedly one of the most impressive experiments to demonstrate and verify the quantum theory. In these demonstrations, it is possible...

Power supply for the Cathode Ray Oscilloscope.

Standard cathode ray tubes for oscilloscopes are poorly suited for demonstrations because important sections of the tubes are electrostatically and magnetically shielded, thus concealed from the view of the observer. Furthermore, these conventional cathode ray tubes require high accelerating...

Cathode Ray Oscilloscope consists of a modified Braun tube, screen diameter 10 cm, an indirectly heated cathode with a near point source emissive oxide spot, and a disc anode with axial hole. This is a spare/replacement Braun tube for this apparatus.

For determining Planck's constant h by measuring the diffusion potential of differently colored LEDs as a function of the wavelength or frequency.