1 Temperature And Heat 2 The Kinetic Theory Of Gases 3 The First Law Of Thermodynamics 4 The Second Law Of Thermodynamics 5 Electric Charges And Fields 6 Gauss's Law 7 Electric Potential 8 Capacitance 9 Current And Resistance 10 Direct-current Circuits 11 Magnetic Forces And Fields 12 Sources Of Magnetic Fields 13 Electromagnetic Induction 14 Inductance 15 Alternating-current Circuits 16 Electromagnetic Waves Chapter16: Electromagnetic Waves
Chapter Questions Section: Chapter Questions
Problem 16.1CYU: Check Your Understanding When the emf across a capacitor Is turned on and the capacitor Is allowed... Problem 16.2CYU: Check Your Understanding Could a purely electric field propagate as a wave through a vacuum without... Problem 16.3CYU: Check Your Understanding The wave equation was obtained by (1) finding the E field produced by the... Problem 16.4CYU: Check Your Understanding What conclusions did our analysis of Maxwell's equations lead to about... Problem 16.5CYU: Check Your Understanding How would the speed and acceleration of a radiation-propelled spacecraft be... Problem 16.6CYU: Check Your Understanding How do the electromagnetic waves f the different kinds of electromagnetic... Problem 1CQ: Explain how the displacement current maintains the continuity of current in a circuit containing a... Problem 2CQ: Describe the field lines of the induced magnetic field along the edge of the imaginary horizontal... Problem 3CQ: Why is it much easier to demonstrate in a student lab that a changing magnetic field induces an... Problem 4CQ: If the electric field of an electromagnetic wave is oscillating along the z-axis and the magnetic... Problem 5CQ: In which situation shown below will the electromagnetic wave be more successful in inducing a... Problem 6CQ: In which situation shown below will the electromagnetic wave be more successful in inducing a... Problem 7CQ: Under what conditions might wires in a circuit wher the current flows in only one direction emit... Problem 8CQ: Shown below is the interference pattern of two radio antennas broabcasting the same signal. Explain... Problem 9CQ: When you stand outdoors in the sunlight, y can you feel the energy that the sunlight carries, but... Problem 10CQ: How does the intensity of an electromagnetic wave depend on its electric field? How does it depend... Problem 11CQ: What is the physical significance of the Poynting vector? Problem 12CQ: A 2.0-mW helium-neon laser transmits a continuous beam of red light of cross-sectional area 0.25... Problem 13CQ: Why is t1 radiation pressure of an electromagnetic wave on a perfectly reflecting surface twice as... Problem 14CQ: Why did the early Hubble Telescope photos of Cornet Ison approaching Earth show it to have merely a... Problem 15CQ: (a) If the electric field and magnetic field in a sinusoidal plane wave were interchanged, in Which... Problem 16CQ: Compare the speed, wavelength, and frequency of radio waves and X-rays traveling in a vacuum. Problem 17CQ: Accelerating electric charge emits electromagnetic radiation. How does this apply in each case: (a)... Problem 18CQ: Compare and contrast the meaning of the prefix “micro” in the names of SI units in the term... Problem 19CQ: Part of the light passing through the air is scattered in all directions by the molecules comprising... Problem 20CQ: When a bowl of soup is removed from a microwave oven, the soup is found to be steaming hot, s1wreas... Problem 21CQ: Certain orientations of a broadcast television antenna give better reception than others for a... Problem 22CQ: What property of light corresponds to loudness in sound? Problem 23CQ: Is the visible region a major portion of the electromagnetic spectrum? Problem 24CQ: Can the human body detect electromagnetic radiation that is outside the visible region of the... Problem 25CQ: Radio waves normally have their E and B fields in specific directions, whereas visible light usually... Problem 26CQ: Give an example of resonance in the reception of electromagnetic waves. Problem 27CQ: Illustrate that the size of details of an object that can be detected with electromagnetic waves is... Problem 28CQ: In which pan of the electromagnetic spectrum are each of these waves: (a) f=10.0kHz , (b) f==750nm ,... Problem 29CQ: In what range of electromagnetic radiation are the electromagnetic waves emitted by power lines in a... Problem 30CQ: If a microwave oven could be modified to merely tune the waves generated to be in the infrared range... Problem 31CQ: A leaky microwave oven in a home can sometimes cause interference with the homeowner’s WIFI system.... Problem 32CQ: When a television news anchor in a studio speaks to a reporter in a distant country, there is... Problem 33P: Show that the magnetic field at a distance r from the axis of two circular parallel plates, produced... Problem 34P: Express the displacement current in a capacitor in terms of the capacitance and the rate of change... Problem 35P: A potential difference V(t) = V0sin tis maintained across a parallel-plate capacitor with... Problem 36P: Suppose the parallel-plate capacitor shown below is accumulating charge at a rate of 0.010 C’s. What... Problem 37P: The potential difference V(t) between parallel plates shown above is instantaneously increasing at a... Problem 38P: A parallel-plate capacitor has a plate area of A=0.250m2 and a separation of 0.0100 in. What must be... Problem 39P: The voltage across a parallel-plate capacitor with area A=800cm2 and separation d = 2 mm varies... Problem 40P: The voltage across a parallel-plate capacitor with area A and separation d varies with time t as V =... Problem 41P: If the Sun suddenly turned off, we would not know it until its light stopped coming. How long would... Problem 42P: What is the maximum electric field strength in an electromagnetic wave that has a maximum magnetic... Problem 43P: An electromagnetic wave has a frequency of 12 MHz. What is its wavelength in vacuum? Problem 44P: If electric and magnetic field strengths vary sinusoidally in time at frequency 1.00 GHz, being zero... Problem 45P: The electric field of an electromagnetic wave traveling in vacuum is described by the following wave... Problem 46P: A plane electromagnetic wave of frequency 20 GHz moves in the positive y-axis direction such that... Problem 47P: The following represents an electromagnetic wave traveling in the direction of the positive y-axis:... Problem 48P: While outdoors on a sunny day, a student holds a large convex lens of radius 4.0 cm above a sheet of... Problem 49P: A plane electromagnetic wave travels northward. At one instant, its electric field has a magnitude... Problem 50P: The electric field of an electromagnetic wave is given by E=(6.0103V/m)sin[2(x18mt6.0 10 8s)] j... Problem 51P: A radio station broadcasts at a frequency of 760 kHz. At a receiver some distance from the antenna,... Problem 52P: The filament in a clear incandescent light bulb radiates visible light at a power of 5.00 W. Model... Problem 53P: At what distance does a 100-W lightbulb produce the same intensity of light as a 75-W lightbulb... Problem 54P: An incandescent light bulb emits only 2.6 W of its power as visible light. What is the rms electric... Problem 55P: A 150-W lightbulb emits 5% of its energy as electromagnetic radiation. What is the magnitude of the... Problem 56P: A small helium-neon laser has a power output of 2.5 mW What is the electromagnetic energy in a 1.0-m... Problem 57P: At the top of Earth’s atmosphere, the time-averaged Porting vector associated with sunlight has a... Problem 58P: The magnetic field of a plane electromagnetic wave moving along the z axis is given by B... Problem 59P: What is the intensity of an electromagnetic wave with a peak electric field strength of 125 Vim? Problem 60P: Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of... Problem 61P: An AM radio transmitter broadcasts 50.0 kW of power uniformly in all directions. (a) Assuming all of... Problem 62P: Suppose the maximum safe intensity of microwaves for human exposure is taken to be 1,00 W/m2. (a) If... Problem 63P: A 2.50-rn-diameter university communications satellite dish receives TV sigia1s that have a maximum... Problem 64P: Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief... Problem 65P: A 1-W lightbulb emits 5% of its energy as electromagnetic radiation. What is the radiation pressure... Problem 66P: What pressure does light emitted uniformly in all directions from a 100-W incandescent light bulb... Problem 67P: A microscopic spherical dust particle of radius 2m and mass 10g is moving in outer space at a... Problem 68P: A Styrofoam spherical ball of radius 2 mm and mass 20g is to be suspended by the radiation pressure... Problem 69P: Suppose that S avg for sunlight at a point on the surface of Earth is 900W/m2. (a) If sunlight falls... Problem 70P: reaches the ground with an intensity of about 1.0kW/m2 . A sunbather has a body surface area of 0.8... Problem 71P: Suppose a spherical particle of mass m and radius R in space absorbs light of intensity I for time... Problem 72P: How many helium atoms, each with a radius of about 31 pm, must be placed end to end to have a length... Problem 73P: If you wish to detect details of the size of atoms (about 0.2 nm) with electromagnetic radiation, it... Problem 74P: Find the frequency range of visible light, given that it encompasses wavelengths from 380 to 760 nm. Problem 75P: (a) Calculate the wavelength range for AM radio given its frequency range Is 540 to 1600 kHz. (b) Do... Problem 76P: Radio station WWVB, operated by the National Institute of Standards and Technology (NIST) from Fort... Problem 77P: An outdoor WIFi unit for a picnic area has a 100-mW output and a range of about 30 m. What output... Problem 78P: The prefix “mega” (M) and “kilo” (k), when referring to amounts of computer data, refer to factors... Problem 79P: A computer user finds that his wireless router transmits data at a rate of 75 Mbps (megabits per... Problem 80P: (a) The ideal size (most efficient) for a broadcast antenna with one end on the ground is one-fourth... Problem 81P: What are the wavelengths of (a) X-rays of frequency 2.01017 Hz? (b) Yellow light of frequency... Problem 82P: For red light of =660nm , what are f,, and k? Problem 83P: A radio transmitter broadcasts plane electromagnetic waves whose maximum electric field at a... Problem 84P: (a) Two microwave frequencies authorized for use in microwave ovens are: 915 and 2450 MHz. Calculate... Problem 85P: During normal beating, the heart creates a maximum 4.00-mV potential across 0.300 m of a person’s... Problem 86P: Distances in space are often quoted in units of light years, the distance ugh travels in 1 year. (a)... Problem 87P: A certain 60.0-Hz ac power line radiates an electromagnetic wave having a maximum electric field... Problem 88P: (a) What is the frequency of the 193-nm ultraviolet radiation used in laser eye surgery? (b)... Problem 89AP: In a region of space, the electric field is pointed along the x-axis, but its magnitude changes as... Problem 90AP: A microwave oven uses electromagnetic waves of frequency f=2.45109 to heat foods. The waves reflect... Problem 91AP: Galileo proposed measuring the speed of light by uncovering a lantern and having an assistant a... Problem 92AP: Show that the wave equation in one dimension 2fx2=1v22ft2 Is satisfied by any doubly differentiable... Problem 93AP: On its highest power setting, a microwave oven increases the temperature of 0.400 kg of spaghetti by... Problem 94AP: A certain microwave oven projects 1.00 kW of microwaves onto a 30-cm-by-40-cm area. (a) What is its... Problem 95AP: E1ecmagnedc radiation from a 5.00-mW laser is concentrated on a 100-mm2 area. (a) What is the... Problem 96AP: A 200-turn flat coil of wire 30.0 cm in diameter acts as an antenna for FM radio at a frequency of... Problem 97AP: Suppose a source of electromagnetic waves radiates uniformly in all directions in empty space where... Problem 98AP: A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of... Problem 99AP: The Poynting vector describes a flow of energy whenever electric and magnetic fields are present.... Problem 100AP: The Sun’s energy strikes Earth at an intensity of 1.37kW/m2 . Assume as a mode! approximation that... Problem 101AP: If a Lightsail spacecraft were sent on a Mars mission, by si1at ratio of the final force to the... Problem 102AP: Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically... Problem 103AP: Radar is used to determine distances to various objects by measuring the round-trip time for an echo... Problem 104AP: Calculate the ratio of the highest to lowest frequencies of electromagnetic waves the eye can see,... Problem 105AP: How does the wavelength of radio waves for an AM radio station broadcasting at 1030 KHz compare with... Problem 106CP: A parallel-plate capacitor with plate separation d is connected to a source of emf that places a... Problem 107CP: A particle of cosmic dust has a density =2.0g/cm3 , (a) Assuming the dust particles are spherical... Problem 98AP: A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of...
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Concept explainers
Study the photo presented below and the data presented in it. Answer the question below.
1. How are the electromagnetic waves in the electromagnetic spectrum arranged in terms of wavelenght?frequency?energy?
Transcribed Image Text: he Electromagnetic Waves' Wavelength, Frequencies and Energies
Radiation type
Wavelength (m)
Radio wave
Frequency (Hz)
Energy (J)
> 1 x 10-1
1 x 10-3 to 1 x 10-1
< 3 x 109
< 2 x 10-24
Microwave
3 x 109 to 3 x 1011
2 x 10-24 to 2 x 10-22
Infrared
7 x 10-7 to 1 x 10-3
3 x 1011 to 4 x 1014
2 x 10-22 to 3 x 10-19
Visible light
4 x 10-7 to 7 x 10-7
4 x 1014 to 7.5 x 1014
3 x 10-19 to 5 x 10-19
UV ray
1 x 10-8 to 4 x 10-7
7.5 x 1014 to 3 x 1016
5 x 10-19 to 2 x 10-17
X-ray
1 x 10-11 to 1 x 10-8
3 x 1016 to 3 x 1019
2 x 10-17 to 2 x 10-14
Gamma ray
< 1 x 10-11
> 3 x 1019
> 2 x 10-14
Interaction between an electric field and a magnetic field.
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