The frequency and wavelength of EM waves can vary over a wide range of values Scientists refer to the full range of frecuencies that EM rad ation can have as tne eiectromagneic spectrum Electromagnetic waves are used extensively in modern wireless technology Many devices are built to emit and/or receive EM waves at a very specific frequency or within a narrow band of frequencies Here are some examples followed by the r frequencies of operation garage door openers: 40.0 MHz. standard cordiess phones 40 0 to 50 0 MHz baby monitors 49 0 MHz • FM radio stations 88 0 to 108 MHz cell phones 800 to 2100 MHz • Giobal Positioning System: 1227 to 1575 MHz - GPS • microwave ovens: 2450 MHz wireless local area networks 2 4 GHz and 5.0 GHz Part B Which of the following statements correctly describe the various applications listed above? Check all that apply. > View Available Hint(s) None of these technologies use radio waves None of these technologies use lower-frequenc; mcrowaves None of these technologies use higner-irecuency microwaves None of these technclogies use infrared waves O The radiation emitted by some wireless local area net: orks nas the shortest wavelength of al the technolog es sted above All these technologies emit waves with a wavelengih in the range 0 01 to 10 0 m Al tnese technclogies emit waves with a wavelengtn in the range 001 to 10 0 km

The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 2.1 x 10-10 T. The wave passes perpendicularly through an open window, the area of which is 0.19 m². How much energy does this wave carry through the window during a 60-s phone call? Number i 14 eTextbook and Media Units

Question 12 Analyze the diagram below. Which of the following EM waves has the shortest wavelength? Wavelength (meters) Radio Microwave Infrared Visible Ultraviolet 103 10-2 10-5 .5 x 10-6 10-8 About the size of... www A B C D microwaves gamma rays visible light infrared X-ray Gamma Ray 10-10 10-12

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Analyze the diagram below. Which of the following EM waves has the longest wavelength? Wavelength (meters) Radio Microwave Infrared Visible Ultraviolet X-ray Gamma Ray 103 10-2 10-5 .5 x 10-6 10-8 10-10 10-12 wwwwwwwww About the size of... A B с D microwaves gamma rays visible light infrared