Some devices use electromagnetic waves to find the location and speed of an object. In these devices, the waves are emitted and then reflected off of the object and returned back toward the device. By knowing the speed of the wave and the time it takes the wave to return to the device, the distance that the wave traveled can be calculated. Which type of wave would be safest to use in this type of device

Q: An electromagnetic wave strikes a 1.69-cm² section of wall perpendicularly. The rms value of the…

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Q: Which of the following statements are true for electromagnetic waves traveling through a vacuum? a)…

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Q: A certain electromagnetic field traveling in glass has a maximum electric field of 1,299 V/m. What…

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Q: Police radar guns measure the speed of moving vehicles by transmitting electromagnetic waves at a…

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Q: The true statement below is A. for an electromagnetic wave, the higher the wave, the higher the…

A: EXPLANATION  a)    We know, Electromagnetic waves vary in wavelength and frequency.      Longer…

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Q: Please solve and answer the question correctly please. Be sure to give the correct units and…

A: A:  f =  4.54887×1014  Hz B:  f =  4.5066×1014 Hz C:  f =  4.61285×1014 HzExplanation:

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Q: What are the wavelengths of electromagnetic wave in free space that have the following frequencies?…

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Q: About 1,336 W/m2 of electromagnetic energy reaches the upper atmosphere of the Earth from the Sun,…

A: Given:-                   About 1,336 W/ m 2 of electromagnetic energy reaches the upper atmosphere…

Q: An electromagnetic wave strikes a 1.20-cm² section of wall perpendicularly. The rms value of the…

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Q: A certain electromagnetic field traveling in glass has a maximum electric field of 1,204 V/m. What…

A: we know that in vacuum- Fe=Fm                                     qE= qvB…

Q: Police radar guns measure the speed of moving vehicles by transmitting electromagnetic waves at a…

A: Given:Police radar transmits at a frequency (ftransmited) =22.4 GHz or 22.4×109 HzCar moving toward…

Q: An electromagnetic wave with a frequency 7.50x1014 Hz propagates with a speed of 2.00x108 m/s in a…

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Q: In order to maximize power, most broadcast antenna have a length that is 1/4 of the wavelength of…

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Q: Police use radar guns and the Doppler effect to catch speeders. The figure below illustrates a…

A: Given that:- Given that :- Original (emitting) frequency of radar gun=8×10^9 Hz

Q: Why this statement is true?The speed of electromagnetic waves in a vacuum is the same for all waves…

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Q: A 25-W incandescent light bulb radiates uniformly in all directions. (a) Calculate the average…

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Q: 4. The Earth reflects approximately 38.0% of the incident sunlight from its clouds and surface. (a)…

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Q: The average intensity of solar radiation reaching Earth's satellite orbit is 1360 W/m?. A…

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Q: Police use radar guns and the Doppler effect to catch speeders. The figure below illustrates a…

A: Speed of police car, VP=0 m/sSpeed of car, VC=31.0 m/sEmitted frequency,  f0=8.0×1010 HzWe know at…

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A: Wavelength of EM radiations is Note:Find:Wavelength of EM radiations.

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Q: A certain electromagnetic wave has an average intensity of 6 x 104 W/m². What is the average energy…

A: Given: The average intensity of the electromagnetic wave is 6x104 W/m2.

Q: The intensity of electromagnetic energy from the Sun reaching the Earth is 1,390 W/m². Earth is…

A: Given information: The Intensity of sunlight received by earth (I1) = 1,390 W/m2 The distance of…

Q: At a certain geographic location, light intensity from the Sun is 900 J/(m² · s). This means that…

A: Light intensity from sun (I) = 900 Jm2.sTotal area of solar panels (A) = 25 m2time (t) = 1 sec