Suitable lenses, correctly combined, as in the following visual can help you to understand how a telescope works.

Heisenberg showed that measuring the magnitude of a quantum particle altered its state, so that another magnitude could not be measured simultaneously

The educational resource shows a visual about the variable intensity of gravity: the intensity of gravity, g, is not a true constant, as it changes with altitude.

The educational resource shows an interactive animation about the thermometer: the fact that mercury and alcohol expand when the temperature increases is used to construct thermometers.

The cathode ray tube gave rise to an application which had an application that became very popular in the second half of the twentieth century: television.

The educational resource shows a visual about the solar system: What is at the centre, the sun or the earth? This question has been asked since the beginnings of humanity. The answer is found in the different models of the solar system.

The educational resource shows a visual about the principle of superposition: when we talk about systems with more than two bodies, we have to bear in mind the Principle of superposition of forces: the force exerted by one body on another is independent of that exerted by the rest.

The educational resource shows a visual about the shape of galaxies: what causes the variety of shapes among galaxies? Some are spiral galaxies, others are elliptical or spherical.

The educational resource shows an interactive animation about the mechanical equivalent of heat.

The educational resource shows an interactive animation about the heating curve: when a body is heated, its temperature increases until there is a change of state; while the change takes place, the temperature remains constant.

The following visual explains the precautions that should be taken into account when dealing with electricity

El ODE muestra una escena interactiva donde se puede comprobar que el trabajo realizado por las fuerzas vivas (fuerza resultante ya restada la del rozamiento) que actúan sobre un sistema, es igual a su energía cinética.

Un montaje como el de la escena siguiente sirve para calcular la tensión superficial de un líquido jabonoso.

Concepto de tensión superficial

The educational resource shows an interactive animation about tempereture scales: there are various ways of expressing what the temperature of a body is. Each system is known as a temperature scale.

Telescope: optics and resolution range. Amateur astronomy is an enjoyable and educational passtime. If at any time you are able and want to get an astronomical telescope you should first find out about its possibilities.

The following visual which simulates a telescope can help you answer which telescope is better.

Telescope elements and the invention of the telescope

Graphs of the movements make data tables unnecessary.

Escena interactiva para estudiar el concepto de superficie equipotencial en un punto. El punto en cuestión se puede mover y está sometido al campo gravitatorio de un planeta, cuya masa se puede modificar. La escena permite dibujar las curvas equipotenciales y las líneas de fuerza asociadas a dicho punto.