Physics Educational Materials

Supplier: KVANT LIFE SCIENCE

Laser light source for mounting on magnetic board (white board or similar). Can be used to advantage in combination with picture optics (765-1009).

Supplier: KVANT LIFE SCIENCE

Equipped with key switch. Wavelength: 532 nm; (4×
2 mm).

Supplier: KVANT LIFE SCIENCE

Laser type: Diode, Wavelength: 635 nm.

Supplier: KVANT LIFE SCIENCE

Equipment for demonstration of geometric optics with laser on magnetic board. With the equipment, a variety of optical phenomena can be demonstrated. Thanks to the light intensity of the laser, the beam path can be monitored through a combination of several lenses. The equipment consists of.

Supplier: IMBE HANDELSBOGALET

Black plastic top with transparent pattern. Consists of four differently colored circular surfaces in the corners of an imaginary square and one uncoloured at the intersection of the diagonals.

Supplier: KVANT LIFE SCIENCE

Educational Materials, Optics, Application: Physics, Hartl's optical disc with laser

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

Used e.g. to form homogeneous magnetic fields. Two identical coils placed in parallel by means of three fastening devices. The coils can be connected in series or in parallel. To determine e/m, the wire beam tube is placed between the Helmholtz coils in such a way that the visible beam is perpendicular to the homogeneous magnetic field. The generated magnetic field can be measured with a magnetic field meter with hall elements. Specifications.

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

The exercise oscilloscope is placed at the Helmholtz coils so that its main axis coincides with the axis of the coils. A sawtooth-shaped voltage is applied to the deflection plates of the oscilloscope so that a smooth horizontal line appears on the screen. Let direct current pass through the coils at a preset anode voltage and adjust the intensity of the current so that the line is focused at one point. The specific charge e/m of the electron can be calculated from the measured values ​​of the anode voltage and the current through the coil.

Supplier: KVANT LIFE SCIENCE

Light box with five parallel-mounted laser diodes (wavelength 635 nm). The diodes are equipped with a collimator and a 5 mm cylindrical lens, which means that the beam path can be followed before, through and after the lens as five sharp and clearly visible, parallel light beams.

Supplier: LUNDGRENS SVERIGE

765-0325 Rubber band, Norstedt; Fits Norstedt's belt generators.

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

Franck-Hertz's experiment is one of the best ways to show the quantum properties of atoms. The experiment verifies the excitation energy of the Hg atoms through collisions with free electrons. Franck-Hertz tubes consist of an oxide cathode, gallery anode and a collection electrode. The evacuated tube contains a drop of Hg. Before starting the measurements, the pipe must be heated to 200 °C, partly to increase the pressure of the Hg steam and partly to obtain a sufficient probability of collision. When the temperature in the tube has become constant, the cathode is heated and a direct voltage which can be varied in the range 0 to 50 V is connected between the cathode and the anode. When the counter voltage is set to about -1,5 V and the anode voltage increases slowly from 0 V, the electrons will soon reach speeds in the acceleration range of the tube so that an increasing part of the primary current reaches the collector electrode. As the velocity of the electron flux approaches the lowest excitation level of the Hg atoms (4,9 eV), the electrons of the Hg atoms are capable of leaving the atoms and thus losing some of their velocity. The collector current drops to a minimum value. The Hg atom then emits its 253,7 nm ultraviolet line and then returns to its normal energy level. As the acceleration voltage increases further, the current reaching the collector electrode will increase again. This process is repeated periodically many times.

Supplier: KVANT LIFE SCIENCE

Equipment for laser sound transmission experiments. The included microphone, tape recorder or function generator is used as the sound source. The rate consists of.

Supplier: KVANT LIFE SCIENCE

A set of optical and mechanical elements that are designed to demonstrate the principles of optics using a coherent laser light source. Students will be helped in their understanding of polarised light, diffraction and interference allowing them to reconstruct a holographic image.

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

Cone-shaped pressure chamber speaker with high power resistance. Used for general acoustic tests, eg together with resonator 765-0080. Connects to a tone generator with amplifier. Melt protection prevents damage during overload. Technical data.

Supplier: LUNDGRENS SVERIGE

Educational Materials, Electricity/Magnetism, Application: Physics, Rubber cloth, 150 × 150 mm

Supplier: OSRAM

Equipment for demonstrating photoelectric power and determining Planck's constant. A photocell is equipped with filters that only transmit light of a certain wavelength. The photocell is illuminated with light from a Hg lamp. The potassium cathode then emits electrons that pass over to the unlit anode. Over time, a voltage arises that prevents new electrons from reaching the anode. The resulting voltage is measured with a measuring amplifier and a voltmeter. The measurement is repeated with filters for different wavelengths. Photocell and Hg lamp are equipped with magnets at the bottom for stable installation on the mounting plate. List of equipment: