Why do we have to use aluminum foil with plastic foil to reflect electromagnetic waves?

Electromagnetic waves are all around us. From radio waves to microwaves, these waves are present in various forms of our daily life. However, sometimes we need to control the way these waves interact with our surroundings. One way to do this is by using a combination of aluminum foil and plastic foil.

Aluminum foil's ability to reflect electromagnetic waves

Aluminum foil is a highly reflective material that can effectively reflect electromagnetic waves. When electromagnetic waves come in contact with aluminum foil, they interact with the free electrons present in the metal. These free electrons then vibrate and create a secondary electromagnetic wave that is equal in magnitude but opposite in direction to the original wave. This secondary wave cancels out the original wave, effectively reflecting it away from the surface of the foil.

Plastic foil's role in the process

While aluminum foil is an excellent material for reflecting electromagnetic waves, it is not always practical to use it alone. This is where plastic foil comes in. Plastic foil is a non-conductive material that does not interact with electromagnetic waves in the same way that metal does. However, when used in conjunction with aluminum foil, it can help to enhance the reflective properties of the aluminum.

Conclusion

In conclusion, using a combination of aluminum and plastic foil is an effective way to control the interaction of electromagnetic waves with our surroundings. Aluminum foil's highly reflective properties allow it to effectively reflect electromagnetic waves, while plastic foil helps to enhance its reflective properties. By using this combination, we can effectively control the way these waves interact with our environment.