What is the definition for "wave" in relation to the electromagnetic spectrum? O a hand motion; an action that you do when you see someone from afar O a phenomenon that allows particles to move from one place to another O the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through O disturbance that moves energy from one place to another

What is the definition for "wave" in relation to the electromagnetic spectrum? O a hand motion; an action that you do when you see someone from afar O a phenomenon that allows particles to move from one place to another O the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through O disturbance that moves energy from one place to another

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 90AP: A microwave oven uses electromagnetic waves of frequency f=2.45109 to heat foods. The waves reflect...

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Similar questions

Which of the following is true for electromagnetic waves? (6.3) (a) They have different speeds in vacuum for different frequencies. (b) They are longitudinal waves. (c) They require a medium for propagation. (d) None of the preceding is true.
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You will learn that light is an electromagnetic wave that can travel through a vacuum. Can sound waves travel through a vacuum?
A microwave oven uses electromagnetic waves of frequency f=2.45109 to heat foods. The waves reflect from the inside walls of the oven to produce an interference pattern of standing waves whose antinodes are hot spots that can leave observable pit marks in some foods. The pit marks are measured to be 6.0 cm apart. Use the method employed by Heinrich Hertz to calculate the speed of electromagnetic waves this implies.
Police radar detects the speed of a car (Fig. P38.15) as follows. Microwaves of a precisely known frequency are broadcast toward the car. The moving car reflects the microwaves with a Doppler shift. The reflected waves are received and combined with an attenuated version of the transmitted wave. Beats occur between the two microwave signals. The beat frequency is measured. (a) For an electromagnetic wave reflected back to its source from a mirror approaching at speed v, show that the reflected wave has frequency f=c+vcvf where f is the source frequency. (b) Noting that v is much less than c, show that the beat frequency can be written as fbeat = 2v/. (c) What beat frequency is measured for a car speed of 30.0 m/s if the microwaves have frequency 10.0 GHz? (d) If the beat frequency measurement in part (c) is accurate to 5.0 Hz, how accurate is the speed measurement?
In which pan of the electromagnetic spectrum are each of these waves: (a) f=10.0kHz , (b) f==750nm , (C) f=1.25108Hz , (d) 0.30 nm
Make a list of some of the many practical consequences of Maxwell’s theory of electromagnetic waves (television is one example).
What are the differences between light waves and sound waves?
Which type of wave has a longer wavelength: AM radio waves (with frequencies in the kilohertz range) or FM radio waves (with frequencies in the megahertz range)? Explain.
Review. A microwave oven is powered by a magnetron, an electronic device that generates electromagnetic waves of frequence 2.45 GHz. The microwaves enter the oven and arc reflected by the walls. The standing-wave pattern produced in the oven can cook food unevenly, with hot spots in the food at antinodes and cool spots at nodes, so a turntable is often used to rotate the food and distribute the energy. If a microwave oven intended for use with a turntable is instead used with a cooking dish in a fixed position, the antinodes can appear as burn marks on foods such as carrot strips or cheese. The separation distance between the burns is measured to be 6 cm 5%. From these data, calculate the speed of the microwaves.
If a microwave oven could be modified to merely tune the waves generated to be in the infrared range instead of using microwaves, how would this affect the uneven heating of the oven?
Radio waves transmitted through space at 3.00108m/s by the Voyager spacecraft have a wavelength of 0.120 m. What is their frequency?