I'm in a science fair project I didn't ask or want to be in and I need informational help. My project was to test different materials to see if they block radio waves. Aluminum foil was one of them and it is the only material that blocked radio waves. Now to the point, I have to type this part called ''Application''. It is how any gained information from this project can apply to the world or help real-life situations. The only thing I learned from this project is that aluminum foil blocks waves because it is an electrically conductive metal that can reflect and absorb radio waves and that every technological device or machine needs radio waves to work. But how can this help world situations ?! Who would want to block radio waves in real life? Everyone needs or probably wants radio waves! How can this be applied to the world?! Please help! It is taking me forever to get through this section of the project and I'm seriously almost done!!!!
Sometime you need to keep a signal inside and interference outside. Take a close look at your cable TV wire. There is likely foil between the outside plastic shield and the inside wire. The signal going down the wire is within the RF band and the foil helps insulate it from outside noise. There are many applications where you need to shield devices, wiring is just one example. Good luck!
You are not able to use just any foil. You need specified alien security foil. It is rather targeted and difficult to manufacture, so it is rather steeply-priced. Most effective secret govt agencies can get it, but i have smuggled a supply out of the federal government place of work the place I work and am inclined to sell it to you for only $100 a rectangular foot. Contact me off record.
that every technological device or machine needs radio waves to work this is not true. Only the ones that communicate (receive, transmit or both) need them. A microwave oven uses radio waves but it is also completely sealed to contain them so they don't cook flesh around them - it has no use for radio waves getting. A common portable CD or DVD player that does not include an AM or FM radio does not need radio waves. All of my power tools (drills, etc.) and kitchen appliances (mixer, etc.) have no use for radio waves. And in fact, many of those devices that do involve radio waves also generate radio interference so their cases have to be made of or lined with a thin layer of metal which could be aluminum to keep them from bothering nearby equipment and the radio signals have to be carefully brought in from a more or less distant antenna.
Some devices don't use radio waves, a CD player for example. Radio waves are flying around everywhere, and can interfere with some of the sensitive singals inside these devices, so we want a way to block the waves. Some devices produce radio-waves, not as an intended output of the device, but as a byproduct of another function. Your computer is an example of this. And these devices can interfere with the operation of devices that are close by, like your cell phone. So we want to stop these accidentally produced waves from getting out of the computer. And sometimes a part of a device uses radio waves while another part of the same device doesn't, and must be shielded from the other part or it won't work properly.
Aluminum (or any metal) block's and reflects radio waves, true. applications Shield room, aka faraday shield. If you totally enclose a room in metal, you have a space completely free or radio signals. This allows testing of very sensitive components and systems. Radar and microwave antenna, are shaped in a parabolic form so the radio waves are reflected from the metal antenna and concentrated in one spot. This essentually amplifies the signals. Microwave ovens are surrounded by a metal case to prevent the microwaves from escaping and heating up something not designed for that, such as your body Much audio and TV equipment is mounted in a metal box to prevent outside radio signals from interferring with the operation of the equipment. and lots more.
