What is electromagnetic wave in PowerPoint?
PowerPoint Presentation. Electromagnetic Waves and Material Interactions. Light, microwave, x-ray, TV, and cell phone transmission are all kinds of electromagnetic waves. Electromagnetic waves are a group of energy waves that are mostly invisible and can travel through empty space.
What is the wavelength of microwave frequency?
Microwave frequencies range between 109 Hz (1 GHz) to 1000 GHz with respective wavelengths of 30 to 0.03 cm.
How many wavelengths are in a microwave?
Microwaves have frequencies ranging from about 1 billion cycles per second, or 1 gigahertz (GHz), up to about 300 gigahertz and wavelengths of about 30 centimeters (12 inches) to 1 millimeter (0.04 inches), according to the Encyclopedia Britannica.
What are microwaves electromagnetic spectrum?
Microwaves are defined as electromagnetic radiations with a frequency ranging between 300 MHz to 300 GHz while the wavelength ranges from 1 mm to around 30 cm. The microwave radiation is commonly referred to as microwaves. They fall between the infrared radiation and radio waves in the electromagnetic spectrum.
How do microwaves work electromagnetic spectrum?
Microwave ovens work by using 2.45 GHz frequency electromagnetic waves know as microwaves to heat the water in food. Water absorbs the energy from the electromagnetic waves and turns that energy into thermal motions causing the temperature of the food to increase.
What is electromagnetic spectrum PDF?
The electromagnetic spectrum is the complete spectrum (or continuum) of all forms of “light” An electromagnetic wave consists of electric and magnetic fields which vibrate – thus making waves.
Where is microwaves on the electromagnetic spectrum?
Microwaves are a portion or “band” found at the higher frequency end of the radio spectrum, but they are commonly distinguished from radio waves because of the technologies used to access them. Different wavelengths of microwaves (grouped into “sub-bands”) provide different information to scientists.
What type of wave is a microwave?
electromagnetic waves
When you listen to the radio, watch TV, or cook dinner in a microwave oven, you are using electromagnetic waves. Radio waves, television waves, and microwaves are all types of electromagnetic waves.
What are microwaves waves used for?
The uses of the microwave are similar to that of radio waves. They are used in communications, radio astronomy, remote sensing, radar, and of course, owing to their heating application, they are used in cooking as well.
What are the characteristics of microwaves?
Microwaves have three characteristics that allow them to be used in cooking: they are reflected by metal; they pass through glass, paper, plastic, and similar materials; and they are absorbed by foods. A device called a magnetron inside the oven produces microwaves.
What are the properties of microwaves?
They fall between the infrared radiation and radio waves in the electromagnetic spectrum. A few of the properties of microwaves are as follows: Metal surfaces reflect microwaves. Microwaves with a certain wavelength pass through the earth’s atmosphere and can be useful in transmitting information to and from satellites in orbit.
What do all electromagnetic waves have in common?
Brief SUMMARY A. All electromagnetic waves travel at the same speed. (300,000,000 meters/second) in a vacuum. B. They all have different wavelengths and different frequencies. Long wavelength-lowest frequency Short wavelength highest frequency The higher the frequency the higher the energy. Electromagnetic Waves Transverse waves without a medium!
What type of electromagnetic waves do not need a medium?
Electromagnetic waves move transversely and DO NOT need a medium. Includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. c radiation) coming from man and released by stars Remember the electromagnetic spectrum
What are microwaves used for?
Microwaves are used in radar, in communications, and for heating in microwave ovens and in various industrial processes. Lower frequency and longer wavelength than visible light.