As we already saw the basic concept of waves and the terminology involved in waves and the types of waves. If you haven’t read it yet. Click on the following link: https://engineer29.com/lets-know-about-the-veracious-information-of-waves/. Today we are going to see about the analysis of microwave.
Before you know about Maxwell, Faraday was founded that changing in a magnetic field with respect to time at a certain point, produces an electric field at that point. In 1865, Maxwell came up with a theory that if a change of magnetic field resulted in Producing an electrical field, then changing in electric field with respect to time at a certain point, produces a magnetic field at that point. Then he came up with a theory of electromagnetic waves.
After that Heinrich Hertz discovered electromagnetic waves in the years 1885 – 1889. In 1887, Heinrich Hertz demonstrated the existence of electromagnetic waves, which is predicted by Maxwell. He successfully produced a radio wave in his laboratory.
The speed of the electromagnetic waves in free space was proved 3*10^8 m/s. They proved the speed of waves theoretically as well as practically. There are four important types of electromagnetic waves. They are,
- Radio wave.
- Ultra violet wave (u v).
A microwave is a wave in which its wavelength ranges from about one meter to one millimeter, and its frequency ranges between 300 Megahertz to 300 Gigahertz. The prefix micro used in microwaves doesn’t mean the wavelength will be in micrometer. It means the wavelength is smaller compared to radio waves.
Uses of microwaves:
- Before the discovery of fiber-optic transmission, microwaves are commonly used for communication.
- Modern technology like Bluetooth, Wi-Fi, and the IEEE 802.11 specifications used for Wi-Fi, uses microwaves.
- Some smart phones networks uses microwaves.
- Microwave radio is used in telecommunication and broadcasting transmissions.
APPLICATION OF MICROWAVES:
A microwave oven is a piece of equipment extensively used in the food industry. A microwave oven passes microwave radiation of frequency over 2.50 Gigahertz (12 cm) through food, which resulted in causing dielectric heating by the absorption of the energy in water. In the later ’90s, microwave ovens became a common kitchen appliance among western countries. It is also used in industrial processes for drying, and curing products.
Radar is a radiolocation technique in that a beam of the radio wave is emitted by a transmitter and received by a receiver. The shortest wavelength of microwave can be extensively used to cause large reflections on the object. Microwave radar is used in air traffic control, navigation of ships, speed limits, and weather forecasting.
Astronomical radio sources will emit microwaves to stars, galaxies, nebula’s, and planets like Uranus. Neptune with large dish antennas called radio telescopes.
A major recent focus of microwave radio astronomy is the mapping of cosmic microwave background radiation(CMBR), which is discovered in 1964 by radio astronomers Arno Penzias and Robert Wilson.
A recently completed microwave radio telescope is the Atacama Large Millimeter Array, located at more than 4500 meters and over 16500 ft of altitude, Observe the universe with the help of millimeter and submillimeter wavelengths.