Electromagnetic Energy

Electromagnetism is an energy associated with the attraction between positive and negative particles. This energy can be found with magnets, electric cars, and also in things as natural as lightning. Electromagnetism can occur when positive charged particles are attracted to negatively charged particles. If the connection is strong and they are in the position they can do so, the particles could/would move closer to each other. However, if you have two same charged particles they will repel and possibly move away from each other. The most common example of electromagnetism would probably be magnets. If you position the magnets with opposite sides facing each other, they attract. Except if there are two positive sides or two negatives sides facing each other the magnets will try to move away from each other or one will try to flip and change sides. Electromagnetic energy is the attraction and of charged particles.
electromagnetism LK.JPG
Figure 1:The attraction and repulsion between charged particles.












An example of electromagnetic energy: Microwaves

An example of electromagnetism being used is in a microwave oven. The microwave is connected to an electrical outlet. From the outlet an electric current (basically many electrons) runs to the microwave. The electrons travel to a vacuum tube (this is inside the Microwave). In the vacuum tube the current is converted from electric currents to microwaves. Microwaves are a from of electromagnetic waves. These waves are electric and magnetic fields traveling together. (This is one of the four fundamental forces of nature) The food absorbs the energy from the microwaves and is cooked.

microwave LK.JPG
Figure 2: A diagram of a microwave.
Microwave LAK.jpg
Figure 3: A model of of a microwave


My experiment: Radiometers

The purpose of this experiment was to figure out what happens when a flashlight is shined on different parts of a radiometer. First the Radiometer was observed standing still on the table without anything altering it. Next a Flashlight was aimed at the White vanes and they were observed. Observations were recorded. Lastly, A flashlight was placed to shine on the black vanes. Observations were made and recorded. After conducting this experiment, it was found that when the radiometer was un-altered and when the flashlight shines on the white vanes nothing happens. However, when the light was shined on the black vanes the vanes began to spin quickly. This is because of how the different colored vanes react differently to the light. When flash light shines on the white vanes the light reflects off of them. When the light is shined on the black vanes, they heat up and absorb the light. This causes the air to flow from the white side of the vanes to the black side, causing the vanes to spin.
radiometer vanes LAK.png
Figure 4: This is a radiometer. The white and black vanes (that spin) are located at the top of the bulb.
How radiometers wprk Lak.jpg
Figure 5: The affect light has on the vanes