war, radar proved to be more than an expert enemy locator. Radar technicians, doodling away in their idle moments, found that they could focus a radar beam on a marshmallow and toast it. They also popped popcorn with it. Such was the beginning of microwave cooking. The very same energy that warned the British of the German Luftwaffe invasion and that policemen employ to pinch speeding motorists, is what many of us now have in our kitchens. It's the same as what carries long distance phone calls and
Microwaves are low on the electromagnetic spectrum. The electromagnetic spectrum is a range of all the possible electric radiation. Frequency of a wave is the number of waves per second and the frequency of a microwave is between 300 MHz and 300 GHz. The wavelength of a wave is the distance from one peak of a wave to the peak of a following wave and a wavelength of a microwave varies from one millimeter to thirty centimeters. The frequencies range from ultra high frequency to super high frequency
Physics of Microwaves Microwaves are used in our everyday lives but most most people don't realize that physics plays a large and important part in the simple household item. Whenever we heat our food we are oblivious to the forces that cause such a thing to occur and we don't fully understand what happens in front of our eyes and how our food really gets heated in such a simple and efficient way. The first thing people need to understand is that microwaves are actually electromagnetic waves. Wavelengths
nothing.” according to Jack Welch. So the government has decided to take a closer look at high powered Micro waves. In his paper I‘m going to speak to you about high power microwaves, it’s applications, a comparison of two different types, some of the history, and the findings in results of its research. “High power microwaves (HPM) is an imprecise term used by several communities [1]. In the DoD it pertains primarily to the generation of high peak power bursts of narrowband (coherent) electromagnetic
Microwaves are an important part of our society. We use them in everyday life and its a commonly held in households, but there are negative effects to them. Microwave Radiation is lethal and you can get it from microwaves and other things in your everyday life. Over time things have been altered in order to keep people safe. Modifications have been made to microwaves in order to reduce the risk of microwave radiation. Microwave Ovens were discovered accidentally by, Percy Spencer in 1945. He was
INTRODUCTION A microwave oven is a kitchen electrical appliance that passes an electromagnetic wave with an extremely high frequency that is used to cook food. By absorbing energy from water molecules in the food, heat is produced, and therefore cooking can be performed. Besides cooking, microwave oven can be used to warm up food as well as used to defrost frozen food. Invention of microwave ovens definitely saves us a lot time and electricity. During this week laboratory class, we have been assigned
burrito on a paper plate and pop it in the microwave. “Cook for one and a half minutes on each side and let stand for a couple of minutes.” Vuala! Your hunger has been satisfied! I have set up this scenario for you to show you how much the inventor of the microwave oven is unappreciated. This person is a genius. This invention is extremely convenient, portable, and easy to use. First, I would like to mention how convenient this item is. Before the microwave, one would have to go through a series of
Like many great science inventions of the past, the microwave oven was stumbled upon during another research project. The man who stumbled upon this great kitchen appliance that we use today, is Dr. Percy Spence, a self-taught engineer who worked for the Raytheon Corporation. Dr. Spence was working on a radar-related research project involving a new vacuum tube called a magnetron. It was during this research one day that he had noticed a candy bar he had in is pocket melted. Being a scientist
The microwave oven, a tool that we use often in our busy lives to heat up foods when we just don't have the time or patience for a conventional oven to do its work. How does this device work? It's pretty simple if we use the basics of physics to explain it. Vibrations from the high frequency radio waves cause the water and fat cells in food to generate heat through friction of the molecules. An example of this using a turkey shows the molecules positive and negative particles acting through
complex when one looks at the details. Physics helps us understand the basics of how life operates. Microwave ovens are often used to reheat left over food, cook TV dinners and frozen foods, and to quickly heat food but is seldom recognized and understood by those who use them. People typically don’t know how a microwave oven operates, how it is structured, or how the food is actually heated. Microwaves were first created in 1947 being 1.8 meters in height and 750 lbs created by Percy Spencer while
it’s procrastination or stubbornness or raw fear, but there’s a reason we only just now got rid of our microwave, which made its first spectacular appearance in our lives in 1991. I remember the day my mother, finger wagging, told us of the dangers of opening the door while the microwave was still running. Her point was not that it would be harmful to us, but rather that it would hurt the microwave, as though after being opened mid-cook, it would simply lose the will to go on. “I’m sorry,” it would
The History of Microwave Radiation, its Common Uses, and its Effects on Human Anatomy Overview Beyond our earthbound lives exists a firmament of endless wonder, filled with waves and particles unfathomable to the human eye. Ultraviolet, infrared, and radio waves permeate our atmosphere from beyond our space and time. These include microwaves. From their origins at the Big Bang, the pulses of these waves can still be observed to this day. This primordial radiation can be utilized for multiple things
telephone and the nearest base station is achieved by the microwave emissions from the antenna. Concerns have been raised about the type of mobile telephone that has the antenna in the handset. In this case, the antenna is very close to the user's head during normal use of the telephone and there is concern about the level of microwave emissions to which the brain is being exposed. Media reports have claimed that up to 2/3 of the microwave emissions from hand- held mobile telephones may be absorbed
Microwave signals tend to be 300MHz to 300GHz which is a signal that is sent through the air. Satellites are stations which will orbit the earth in a pattern; if there was no relay stations then we would all rely on the satellite to be in the same position
engineering construction in the Toronto area. This resulted in a number of buildings rising over hundreds of feet. In order to solve this problem, a tower was built to rise above all of these buildings and stop the problem with communications. With the microwave towers rising to over 338m, and the antenna rising to the top of the ... ... middle of paper ... ...quished ownership from 1997 to Jan 2004. The TrizecHahn Corporation took control over it in order to perform a 26 million dollar expansion for
safe location when the time is necessary. Radar, stands for Radio detection and ranging. Radar transmits microwaves in a focused beam. The microwave energy bounces off of its primary object and returns as data to be measured (Weather Questions 1). Radar then will send pulses of energy, rather than a continuous signal, which it will then measure how far away the object was when the microwaves reflected off of it. Combined with the radar's ability to scan up and down and in a circular motion which
The transmission of words, sounds, images, or data in the form of electronic or electromagnetic signals or impulses. Transmission media include the telephone (using wire or optical cable), radio, television, microwave, and satellite. Data communication, the fastest growing field of telecommunication, is the process of transmitting data in digital form by wire or radio. Digital data can be generated directly in a 1/0 binary code by a computer or can be produced from a voice or visual signal
Spencer”). Percy LeBaron Spencer was the most influential person in the 1940-1959 time era because his invention of the microwave oven, changed the way food was prepared, and U.S. bombers became powerful
Microwaves are electromagnetic radiation waves that have a very short wavelength. These waves can be used in various ways, for example, radars, communication or heating. In the 1940’s, during World War 2, a scientist called Percy Spencer was doing research with these microwaves. He then found out about how they are able to excite food molecules, causing food to heat up very quickly. When first invented, microwave ovens weren’t meant to be kitchen appliances. They were named “Radaranges” and when
convenience of a microwave, it has made our life a little easier. In fact, you can microwave a frozen dinner in just thirty-minutes. Many people have been exposed to the less stressful and convenient way of preparing meals. For these reasons it has resulted and leads us to be lazy and obesity. Meanwhile, fast food restaurants are one of the most common uses that most people depend on. According to Christopher Gussa, “It is the nation’s number one causes for obesity related diseases” (Microwave Ovens: The