How To Make An Easy Globe Theater

Bulletin May 2010

I
microwave ovens are evidence that electromagnetic radiation can have unexpected effects. The reason is explained in the first historical article of this blog. To summarize, the phenomenon is as follows: microwave carry energy and this energy is released in all water molecules that make up our share of food to be cooked or heated. But it is possible that the radiation of the microwave oven to escape and end up in the food instead of going elsewhere? The answer is yes, you may experience, and can be remedied "
Unfortunately it is difficult to confine the energy. Some manufacturers are doing their best to turn the microwave oven in a Faraday cage
. This is an elementary device, known since the first discoveries in electricity, to transfer electricity (shock that propagates through air or radiation) in a mesh cage in the form of electricity, but because the grid does not form is grounded, the electricity does not disappear but is dissipated by the mesh and re-emitted at a different Frequency range. In fact you can see the mesh in the windows of the doors of some microwave ovens. Some manufacturers, more wisely, decided to eliminate the window and the mesh to coat the entire room of the microwave with metal surfaces, this system corresponds to a dense-mesh cage, and therefore more efficient. Note: The technique of Faraday cage becomes more efficient with a metal surface. For example, the aluminum foil wrapped around a mobile island completely, by reflection, its signal. However, it is unthinkable to hold off all the waves in this way, because there are effects and quantum wave (well, these things are too difficult to explain in a blog ... you should study the physics well). To verify this just take a device that receives microwave and see if it works in the oven (off course! If not cook!). Devices operating at microwave we have several unfortunately: mobile and cordless phones are the most convenient and popular, but we must be more precise. The microwave function at a frequency of 2.4 GHz

. In this blog we have seen that the range of microwave frequencies including

quite different. In short you need a phone that works at the same frequency used by microwave ovens, mobile phone or a UMTS or 3G
. In some blogs, it is advisable to use any phone, but could use a frequency slightly different from what we need for verification.
Take a UMTS access, you put it in the oven (turned off) and closes the door, and now try to call that number: if the phone rings field and there is then the oven is not well shielded. Trivial is not it?
Shield the oven is another banality, at least conceptually. Just remember that water is a substance that absorbs all wavelengths of the frequency of 2.4 GHz for the physical phenomenon of resonance
. So to stop a wave of that frequency is enough water. To shield a microwave is enough water. Obviously, I realize how inconvenient it is this solution, you just have to be creative and find an elegant way to put water around the oven. Meanwhile, when the oven is on, do not stay near the porthole and watch the food that is cooked. E I also abandoned my UMTS mobile phone to return to use (sparingly and with headphones) only a dual band phone with GSM card.