Since that point it has been convention that has held microwaves at 2.5 GHz, and I beilieve that is the frequency allocated to microwaves … Microwaves have many uses including radar, radio astronomy, and to heat food in a microwave oven. Microwave transmissions Wireless technology uses microwaves and radio waves to transmit information. The electrons in a water molecule tend to remain closer to the oxygen nucleus than the hydrogen nuclei (Figure \(\PageIndex{3}\)). The weaker the signal reaching the detector, the more rain the microwaves have passed through. Microwaves cause water and fat molecules to vibrate, which makes the substances hot. Microwaves are good for transmitting information from one place to another place because microwave energy can penetrate through, light rain, snow, clouds, and smoke. The selling point of microwave ovens is that they heat the food with a lower power input. Electromagnetic radiation - Electromagnetic radiation - Microwaves: The microwave region extends from 1,000 to 300,000 MHz (or 30 cm to 1 mm wavelength). So the first part of the answer to your question is simple enough - if microwave ovens used visible or IR light, we would not call them microwave ovens, just ovens. The waves reflect from the inside walls of the oven to produce an interference pattern of standing waves whose antinodes are hot spots that can leave observable pit marks in some foods. Wifi also uses microwaves.. Microwaves of 2.45 GHz are commonly used in microwave ovens. With the help of frequency modulation, the caller's sound waves are encoded in microwaves by changing its frequency. But microwave ovens weren't sold as "this is a lot more awesome, because it uses microwaves!". A microwave oven uses electromagnetic waves of frequency to heat foods. Mobile phones use microwaves, as they can be generated by a small antenna, which means that the phone doesn't need to be very big. These are also used to transmit telephone conversations. Microwaves are used in cell phones. https://byjus.com/physics/electromagnetic-spectrum-microwave This creates two separated centers of equal and opposite charges, giving the molecule a dipole moment . Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 MHz and 300 GHz respectively. Microwaves and their uses, and how cell phones and radar work. So we can use microwaves to cook many types of food.. The pit marks are measured to be 6.0 cm apart. Advantages are: Unlike longer radio waves, they do not bend around land obstacles but go in line of sight. Microwaves sent through the atmosphere will be absorbed by water so they can be used to monitor rain. These encoded microwaves are transmitted to cell tower via air. Microwave is the carrier of the signals of cell phones. Microwaves are often used in radar, telemetry and microwave ovens. Shorter microwaves are used in remote sensing. Learn about and revise electromagnetic waves, their uses and dangers, and the absorption and emission of radiation with GCSE Bitesize Physics. They are broadly defined as having a wavelength between 1 millimeter and 1 meter, or narrowly between 3 mm and 300 mm. Although microwaves were first produced and studied in 1886 by Hertz, their practical application had to await the invention of suitable generators, such as the klystron and magnetron. A microwave is a high-frequency radio wave. Microwaves use 2.5 GHz not because it is water's reasonant frequency, but because that was a convenient magnetron frequency to make back in the day. Measured to be 6.0 cm apart will be absorbed by water so they can be used monitor! 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