DATA As a physics lab instructor, you
Use the data to calculate c, the speed of the
Figure P32.50
Want to see the full answer?
Check out a sample textbook solutionChapter 32 Solutions
University Physics with Modern Physics, Volume 1 (Chs. 1-20) and Mastering Physics with Pearson eText & ValuePack Access Card (14th Edition)
Additional Science Textbook Solutions
Essential University Physics: Volume 2 (3rd Edition)
Modern Physics
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
The Cosmic Perspective (8th Edition)
Introduction to Electrodynamics
- The electric part of an electromagnetic wave is given by E(x, t) = 0.75 sin (0.30x t) V/m in SI units. a. What are the amplitudes Emax and Bmax? b. What are the angular wave number and the wavelength? c. What is the propagation velocity? d. What are the angular frequency, frequency, and period?arrow_forwardThe maximum electric field strength in air is 3.0 MV/m. Stronger electric fields ionize the air and create a spark. What is the maximum power that can be delivered by a 1.1-cm-diameter laser beam propagating through air? Express your answer to two significant figures and include the appropriate units. P=arrow_forwardA radio antenna broadcasts a 1.0 MHz radio wave with 25 kW of power. Assume that the radiation is emitted uniformly in all directions.a. What is the wave’s intensity 30 km from the antenna?b. What is the electric field amplitude at this distance?arrow_forward
- A 15.0 mV helium-neon laser emits a uniform beam of circular cross section with a diameter of 2.0 mm. Find a) the maximum electric field in the beam. b) the total energy contained in a 1.00 meter length of the beam. c) the momentum carried by a 1.00 meter length of the beam?arrow_forwardThe radar system at an airport broadcasts 22 GHz microwaves with 300 kW of power. An approaching airplane with a 62 m2 cross section is 66 km away. Assume that the radar broadcasts uniformly in all directions and that the airplane scatters microwaves uniformly in all directions. What is the electric field strength of the microwave signal received back at the airport 440 μs later?arrow_forwardRadiation of a single frequency reaches the upper atmosphere of the earth with an intensity of 1350 W/m². What is the maximum value of the electric field associated with this radiation? Provide the answer: V/marrow_forward
- The maximum allowed leakage of microwave radiation from a microwave oven is 5.0 mW/cm2. If microwave radiation outside an oven has the maximum value, what is the amplitude of the oscillating electric field?arrow_forwardSatellite TV is broadcast from satellites that orbit 37,000 km above the earth’s surface. Their antennas broadcast a 15 kW microwave signal that covers most of North America, an area of about 2.5 x 107 km2.a. What is the total power that strikes a 46-cm-diameter ground-based dish antenna?b. The dish antenna focuses the incoming wave to a 1.0 cm2 area. What is the amplitude of the electric field at this focus?arrow_forwardConsider an electromagnetic wave travelling in a vacuum with an electric field given by E(y,t)=(3×106 [V/m])î cos [ky+(2.7×1015 [rad/s])t]. What are the direction, frequency, and wavelength of the traveling wave? A. The EM wave is traveling along the k direction with frequency 44.8×105 Hz and wavelength 6.3×102 m. B.The EM wave is travelling along the j direction with frequency 1.7×1016 Hz and wavelength 1.8×10−8 m. C.The EM wave is travelling along the −j direction with frequency 4.3×1014 Hz and wavelength 7.0×10−7 m. D. The EM wave is travelling along the î direction with frequency 2.7×1015 Hz and wavelength 1.1×10−7 m.arrow_forward
- A new cordless phone emits 4.0 mW at 5.8 GHz. The manufacturer claims that the phone has a range of 100 feet. If we assume that the wave spreads out evenly with no obstructions, what is the electric field strength at the base unit 100 feet from the phone?arrow_forwardBiologists often study the patterns of migratory birds by using radar (1–10 GHz electromagnetic waves) to track their flight. To check whether radar waves influence the birds’ flight, researchers tracked the birds visually, both with the radar on and with it off. The 9 GHz radar waves had an intensity of 400 W/m2 at 250 m. What was the amplitude of the electric field at this distance? (The experiments showed that the radar did not affect the birds.)arrow_forwardA radio antenna broadcasts a 1.0 MHz radio wave with 22 kW of power. Assume that the radiation is emitted uniformly in all directions. What is the wave's intensity 29 km from the antenna? What is the electric field amplitude at this distance?arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning