Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
4th Edition
ISBN: 9780133942651
Author: Randall D. Knight (Professor Emeritus)
Publisher: PEARSON
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Chapter 31, Problem 50EAP
A LASIK vision-correction system uses a laser that emits
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Chapter 31 Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Ch. 31 - Prob. 1CQCh. 31 - Sharon drives her rocket through the magnetic...Ch. 31 - If you curl the fingers of your right hand as...Ch. 31 - What is the current through surface S in FIGURE...Ch. 31 - Is the electric field strength in FIGURE Q31.5...Ch. 31 - Do the situations in FIGURE Q31.6 represent...Ch. 31 - In what directions are the electromagnetic waves...Ch. 31 - The intensity of an electromagnetic wave is 10W/m2...Ch. 31 - Prob. 9CQCh. 31 - Prob. 10CQ
Ch. 31 - Prob. 1EAPCh. 31 - 2. A rocket cruises past a laboratory at in the ...Ch. 31 - Prob. 3EAPCh. 31 - Prob. 4EAPCh. 31 - Prob. 5EAPCh. 31 - Prob. 6EAPCh. 31 - Prob. 7EAPCh. 31 - Prob. 8EAPCh. 31 - Prob. 9EAPCh. 31 - Prob. 10EAPCh. 31 - Prob. 11EAPCh. 31 - Prob. 12EAPCh. 31 - Prob. 13EAPCh. 31 - Prob. 14EAPCh. 31 - Prob. 15EAPCh. 31 - Prob. 16EAPCh. 31 - Prob. 17EAPCh. 31 - Prob. 18EAPCh. 31 - Prob. 19EAPCh. 31 - Prob. 20EAPCh. 31 - Prob. 21EAPCh. 31 - Prob. 22EAPCh. 31 - Prob. 23EAPCh. 31 - Prob. 24EAPCh. 31 - Prob. 25EAPCh. 31 - Prob. 26EAPCh. 31 - Prob. 27EAPCh. 31 - Prob. 28EAPCh. 31 - Prob. 29EAPCh. 31 - Prob. 30EAPCh. 31 - Prob. 31EAPCh. 31 - An electron travels with <m:math...Ch. 31 - Prob. 33EAPCh. 31 - Prob. 34EAPCh. 31 - Prob. 35EAPCh. 31 - Prob. 36EAPCh. 31 - Prob. 37EAPCh. 31 - Prob. 38EAPCh. 31 - Prob. 39EAPCh. 31 - Prob. 40EAPCh. 31 - Prob. 41EAPCh. 31 - Prob. 42EAPCh. 31 - Prob. 43EAPCh. 31 - Prob. 44EAPCh. 31 - Prob. 45EAPCh. 31 - The electric field of a 450MHz radio wave has a...Ch. 31 - Prob. 47EAPCh. 31 - Prob. 48EAPCh. 31 - Prob. 49EAPCh. 31 - A LASIK vision-correction system uses a laser that...Ch. 31 - Prob. 51EAPCh. 31 - Prob. 52EAPCh. 31 - Prob. 53EAPCh. 31 - Prob. 54EAPCh. 31 - Prob. 55EAPCh. 31 - Prob. 56EAPCh. 31 - Prob. 57EAPCh. 31 - Prob. 58EAPCh. 31 - Prob. 59EAPCh. 31 - Prob. 60EAPCh. 31 - An electron travels with through a point in space...Ch. 31 - Prob. 62EAPCh. 31 - Prob. 63EAPCh. 31 - Prob. 64EAP
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- The electric field of an electromagnetic wave traveling in vacuum is described by the following wave function: E =(5.00V/m)cos[kx(6.00109s1)t+0.40] j where k is the wavenumber in rad/m, x is in m, t s in Find the following quantities: (a) amplitude (b) frequency (c) wavelength (d) the direction of the travel of the wave (e) the associated magnetic field wavearrow_forwardA certain 60.0-Hz ac power line radiates an electromagnetic wave having a maximum electric field strength of 13.0 kV/m. (a) What is the wavelength of this very-low-frequency electromagnetic wave? (b) What type of electromagnetic radiation is this wave (b) What is its maximum magnetic field strength?arrow_forwardFigure P24.13 shows a plane electromagnetic sinusoidal wave propagating in the x direction. Suppose the wavelength is 50.0 m and the electric field vibrates in the xy plane with an amplitude of 22.0 V/m. Calculate (a) the frequency of the wave and (b) the magnetic field B when the electric field has its maximum value in the negative y direction. (c) Write an expression for B with the correct unit vector, with numerical values for Bmax, k, and , and with its magnitude in the form B=Bmaxcos(kxt) Figure P24.13 Problems 13 and 64.arrow_forward
- Consider an electromagnetic wave traveling in the positive y direction. The magnetic field associated with the wave at some location at some instant points in the negative x direction as shown in Figure OQ24.12. What is the direction of the electric field at this position and at this instant? (a) the positive x direction (b) the positive y direction (c) the positive z direction (d) the negative z direction (e) the negative y direction Figure OQ24.12arrow_forwardA 2.50-m-diameter university communications satellite dish receives TV signals that have a maximum electric field strength (for one channel) of 7.50 (V/m. (See Figure 24.28.) (a) What is the intensity of this wave? (b) What is the power received by the antenna? (c) If the orbiting satellite broadcasts uniformly over an area of 1.501013m2 (a large fraction of North America), how much power does it radiate? Figure 24.28 Satellite dishes receive TV signals sent from orbit. Although the signals are quite weak, the receiver can detect them by being tuned to resonate at their frequency.arrow_forwardAn electromagnetic wave with a peak magnetic field magnitude of 1.50 107 T has an associated peak electric field of what magnitude? (a) 0.500 1015 N/C (b) 2.00 105 N/C (c) 2.20 104 N/C (d) 45.0 N/C (e) 22.0 N/Carrow_forward
- A possible means of space flight is to place a perfectly reflecting aluminized sheet into orbit around the Earth and then use the light from the Sun to push this solar sail. Suppose a sail of area A = 6.00 105 m2 and mass m =6.00 103 kg is placed in orbit facing the Sun. Ignore all gravitational effects and assume a solar intensity of 1 370 W/m2. (a) What force is exerted on the sail? (b) What is the sails acceleration? (c) Assuming the acceleration calculated in part (b) remains constant, find the time interval required for the sail to reach the moon, 3.84 108 m away, starting from rest at the Earth.arrow_forwardCASE STUDY In Example 34.6 (page 1111), we imagined equipping 1950DA, an asteroid on a collision course with the Earth, with a solar sail in hopes of ejecting it from the solar system. We found that the enormous size required for the solar sail makes the plan impossible at this time. Of course, there is no need to eject such an object from the solar system: we only need to change the orbit. A much more pressing problem is Apophis, a 300-m asteroid that may be on a collision course with the Earth and is due to come by on April 13, 2029. It is unlikely to hit the Earth on that pass, but it will return again in 2036. If Apophis passes through a 600-m keyhole on its 2029 pass, it is expected to hit the Earth in 2036. causing great damage. There are plans to deflect Apophis when it comes by in 2029. For example, we could hit it with a 10- to 150-kg impactor accelerated by a solar sail. The impactor is launched from the Earth to start orbiting the Sun in the same direction as the Earth and Apophis. The idea is to use a solar sail to accelerate the impactor so that it reverses direction and collides head-on with Apophis at 8090 km/s and thereby keeps Apophis out of the keyhole. Consider the momentum in the impactors orbit (Fig. P34.75) when the solar sail makes an angle of = 60 with the tangent to its orbit. Current solar sails may be about 40 m on a side, but the hope is to construct some that are about 160 m on a side. Estimate the impactors tangential acceleration when it is about 1 AU from the Sun. Keep in mind that the sail is neither a perfect absorber nor a perfect reflector, and a heavier impactor would presumably be equipped with a larger sail. Dont be surprised by what may seem like a very small acceleration. FIGURE P34.75arrow_forwardYou are working at NASA, in a division that is studying the possibility of rotating small spacecraft using radiation pressure from the Sun. You have built a scale model of a spacecraft as shown in Figure P33.47. The central body is a spherical shell with mass m = 0.500 kg and radius R = 15.0 cm. The thin rod extending from each side of the sphere is of mass mr = 50.0 g and of total length = 1.00 m. At each end of the rod arc circular plates of mass mp = 10.0 g and radius rp = 2.00 cm, with the center of each plate located at the end of the rod. One plate is perfectly reflecting and the other is perfectly absorbing. The initial configuration of this model is that it is at rest, mounted on a vertical axle with very low friction. To begin the simulation, you expose the model to sunlight of intensity Is = 1 000 W/m2, directed perpendicularly to the plates, for a time interval of t = 2.0 min. The sunlight is then removed from the model. Determine the angular velocity with which the model now rotates about the axle. Figure P33.47arrow_forward
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