Sciences de la Terre

Oe 1.7 Les phases lunaires

Principle

This experiment, which should be carried out in a completely darkened room, makes great demands on the students' ability to concentrate and observe.
 

Benefits

• Multifunctional light box - All-in-one: Can be used for geometric optics on the table, colour mixing and ...

Altitude measurement on à trail

Principle

The altitude profile of a hiking trail or route to school can be measured during a school trip or as an exercise for the students. The altitude profile can also be used to demonstrate that the atmospheric pressure decreases when the altitude increases. As a result, the experiment is ...

Altitude measurement on à trail

Observations météorologiques avec Cobra4

Principle

The compact Cobra4 "Weather" multisensor can be employed as a simple means to set up a weather station, which can then be used to explain the relationship between air pressure, humidity, temperature, and light intensity. The measurement combination of a Cobra4 Mobile-Link and a ...

Observations météorologiques avec SMARTsense

Terrain mapping

Principle

The drawing of maps is one of the favourite tasks of the students during geography lessons and of a high didactic value. The altitude measuring function of the Cobra4 Sensor-Unit "Weather" is a user-friendly tool which provides altitude values so that contour lines can be added ...

Terrain mapping with SMARTsense

Comparação das temperaturas do solo e do arlongo do dia com 4 Cobra

Principle

How does the temperature of the air affect the temperature of the soil in the course of a day?

Benefits

• Experiment is part of an experiment set with numerous experiments in ecology
• Universal handheld measurement device can also be used for other measurement parameters ...

Comparação das temperaturas do solo e do arlongo do dia com 4 Cobra

Etude de la structure de monocristaux de NaCl de différentes orientations

Principle

The spectra of the X-rays that are reflected with various different orientations by NaCl monocrystals are analysed. The associated interplanar spacings are determined based on the Bragg angles of the characteristic lines.

Tasks

1. Determine the intensity of the X-rays that ...

Analyse d'une structure de cristal cubique - Méthode depoudres selon Debye-Scherrer



Principe de l'expérience

Lors de l'irradiation d'un échantillon polycrystallin avec des rayons X, on peut observer des figures de diffraction caractéristiques. Ces figures de Debye-Scherrer sont photographiées et ensuite ...

Analyse d'une structure de cristal hexagonale - Méthode des poudres selon Debye-Scherrer

Principle

A polycrystalline zirconium foil is irradiated with X-rays. The resulting Debye-Scherrer reflections are photographed and then evaluated.

Tasks

1. Take Debye-Scherrer photographs of the zirconium sample.
2. Evaluate the Debye-Scherrer rings and assign them to ...

Détermination de structures cristallines par rayonnement X méthode de Laue

Principle

Laue diagrams are produced when monocrystals are irradiated with polychromatic X-rays. This method is primarily used for the determination of crystal symmetries and the orientation of crystals. When a LiF monocrystal is irradiated with polychromatic X-rays, a characteristic ...

Investigation de structures cristallines par rayons X / méthode de Laue avec détecteur digital (XRIS)

Principle

Laue diagrams are produced when monocrystals are irradiated with polychromatic X-rays. This method is primarily used for the determination of crystal symmetries and the orientation of crystals. When a LiF monocrystal is irradiated with polychromatic X-rays, a characteristic ...

Etude de la diffraction par des poudres cristallines en réseaux de Bravais (géométrie Bragg-Brentano)

Principle

Polycrystalline powder samples, which crystallize in the three cubic Bravais types, simple, face-centered and body-centered, are irradiated with the radiation from a Roentgen tube with a copper anode. A swivelling Geiger-Mueller counter tube detects the radiation that is ...