PPT-Microwaves

History of Microwaves In 1945 Dr Perry Spencer a scientist was working in a lab when he felt some heat on his hand The heat was coming from microwaves These were being emitted from a nearby vacuum tube Dr Spencer was curious and place a chocolate bar near the tube Within seconds the chocolate melted That sticky mess was the beginning of a brilliant idea the microwave. 10 No 1 June 2011 Brazilian Microwave and Optoelectronics SocietySBM O received 19 Jan 2009 revised 23 July 2010 acce pted 21 Sept 2010 Brazilian Society of ElectromagnetismSBMag 57513 2011 SBMOSBMag ISSN 21791074 Abstract The study presented in th Guiding of microwaves along a Objects of the experiments Generating standing microwaves on a acter of the electric field strength. from the distances between the nodes of the electric field.In 1890, Cable Losses for Gardiner Signal Xmitter0.0020.0040.0060.0080.00100.00120.00123456789Coaxial cable length M.Percentage of signal. Westflex 103 XR63 (UR67) Thin Ethernet BICC H9590 HDF400 the antenna. History of Microwaves. In 1945, Dr. Perry Spencer, a scientist, was working in a lab when he felt some heat on his hand. The heat was coming from microwaves. These were being emitted from a nearby vacuum tube. Dr. Spencer was curious and place a chocolate bar near the tube. Within seconds, the chocolate melted. That sticky mess was the beginning of a brilliant idea – the microwave!. 5.3 Identify science principles of food preparation.. State Standards. Journal . How often do you cook meals in the microwave? What are your favorite meals to cook in the microwave? Write one paragraph describing the use of your microwave at home.. By Tyler Miller. The Microwave Oven. The first personal microwave was introduced in 1967 by the Amana Corporation. The first microwave for home use was introduced by Tappan in 1955. .. The heating effect of microwaves was discovered accidentally in. -presentation-. DR INZ. . ZDZISŁAW. . PÓLKOWSKI. Polkowice-. 2015. University of . Pitesti and. Dolnośląska Wyższa Szkoła Przedsiębiorczości i Techniki w Polkowicach. STUDENT: . CONSTANTIN. Guiding of microwaves along a Objects of the experiments Generating standing microwaves on a acter of the electric field strength. from the distances between the nodes of the electric field.In 1890, Matthew 11:28-30 1. Hurry sickness robs us of Christ How long have microwaves been around?. In 1945, Dr. Perry Spencer, a scientist, was working in a lab when he felt some heat on his hand. The heat was coming from microwaves. These were being emitted from a nearby vacuum tube. Dr. Spencer was curious and place a chocolate bar near the tube. Within seconds, the chocolate melted. That sticky mess was the beginning of a brilliant idea – the microwave!. Microwave. Abdullah . althunayan. . 200600300. Outline. History. microwaves. . Microwave sources. Communication. . History . The . existence of radio waves was . discovered by . James Clerk Maxwell in 1864 from his equations. In 1888, Heinrich Hertz was the first to demonstrate the existence of radio waves by building a spark gap radio transmitter that produced 450 MHz microwaves. The equipment he used was . ID: 200800667. Outline. The electromagnetic spectrum. Microwaves . Uses of microwaves. Why use microwaves. The Electromagnetic . S. pectrum. Radiations travel as waves. Types of electron radiation. Radio Large wave length. Microwave Cooking How long have microwaves been around? In 1945, Dr. Perry Spencer, a scientist, was working in a lab when he felt some heat on his hand. The heat was coming from microwaves. These were being emitted from a nearby vacuum tube. Dr. Spencer was curious and place a chocolate bar near the tube. Within seconds, the chocolate melted. That sticky mess was the beginning of a brilliant idea – the microwave! Microwaves:. Microwaves are electromagnetic waves with a frequency with wavelengths ranging from one meter to one millimeter (frequencies between 300 MHz and 300 GHz).. Microwaves are ideal when large areas need to be covered and there are no obstacles in the path..