Radio waves and microwaves

This article does not have any sources. You can help Wikipedia by finding good sources, and adding them.

Radio waves and microwaves

Radio waves and microwaves are very important to us for communication. And for heating up left over pizza.

How are people exposed to RF radiation?

Electromagnetic They are both on the long wavelength end of the Electromagnetic Spectrum: Radio waves have wavelengths of 1 m up. The frequency at 1 m is MHz. Microwaves have wavelengths of 1 mm millimeter to 1 m.

The frequency at 1 mm is GHz. We can create radio and microwaves, and they are also produced by the Sun and many other natural sources. Transmitting and Receiving Transmit Your device can then decode the signal, and you can watch or listen to what was sent out.

Broadcasting Radio waves are good at broadcasting sending out to lots of receivers and that is how we get to listen to radio and TV broadcasts.

Radio waves are good at bending around buildings and hills by diffraction see below also. Microwave Ovens Microwave ovens use electromagnetic waves at a frequency of 2.

Microwaves are created by the Magnetron, are sent in different directions by the stirrer, bounce off metal surfaces, and are absorbed by the water in food. Microwaves can travel through glass and plastic and penetrate about a centimeter into food depending on the foodbut bounce off metal surfaces.

So basically you are cooking by heating up the water in the first cm or so of the food. That is why many recipes say to leave the food stand for a while to let the heat spread evenly. Microwaves can also heat us up and can damage our cells.

Keep the door closed when on, and never use a damaged microwave oven. Wave diffraction into a bay Diffraction Diffraction is very important for radio communications! Diffraction is when waves bend around the corner of an obstacle. Radio waves with wavelengths of kilometers diffract over hills and through valleys so you can easily get reception.

But microwaves with wavelength of centimeters tend to go straight. So radio waves are good at "broadcasting" to many people, but microwaves are good at point-to-point communication.Microwave transmission is the transmission of information or energy by microwave radio waves.

Although an experimental mile (64 km) microwave telecommunication link across the English Channel was demonstrated in , the development of radar in World War II provided the technology for practical exploitation of microwave communication.

Radio wave, wave from the portion of the electromagnetic spectrum at lower frequencies than wavelengths of radio waves range from thousands of metres to 30 cm. These correspond to frequencies as low as 3 Hz and as high as 1 gigahertz (10 9 Hz).

Radio-wave communications signals travel through the air in a straight line, reflect off of clouds or layers of the .

Radio waves and microwaves

Radio waves. Radio waves are used for communication such as television and radio. The electromagnetic spectrum Microwaves are used for . The HPC parabolic antenna offers a value engineered high performance parabolic antenna within a 30 cm footprint. Designed for global application, the HPC delivers a lightweight parabolic antenna with superior RF performance in the .

What is radiofrequency (RF) radiation? Radiation is the emission (sending out) of energy from any source. X-rays are an example of radiation, but so is the light that comes from the sun and the heat that is constantly coming off our bodies. Dec 12,  · What is Microwave Radiation?

Microwaves are a form of "electromagnetic" radiation; that is, they are waves of electrical and magnetic energy moving together through space.

Microwave - Wikipedia