Lasers can be constructed that produce an extremely high intensityelectromagnetic wave for a brief time. These devices are called pulsedlasers and can be used to ignite nuclear fusion, for example. Consider apulsed laser that produces an electromagnetic wave with a maximumelectric field strength of 2.73 × 1011 V/m for a duration of 1.00 ns.What energy does it deliver on a 1.00 mm² area?Assume, for simplicity, that the sinusoidal electric field has the sameamplitude (i.e., constant maximum electric field strength) throughout theduration of the pulse.

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University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 87P: A certain 60.0-Hz ac power line radiates an electromagnetic wave having a maximum electric field...

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A 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?
A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of this signal if it is received on a planet orbiting Proxima Centuri, the closest star to our Sun, at 4.243 ly away?
A high-energy pulsed laser emits a 1.1-ns-long pulse of average power 1.5×1011 W. The beam is nearly a cylinder 2.3x10-3 m in radius and it travels in free space. ▼ Determine the energy delivered in each pulse. Express your answer to two significant figures and include the appropriate units. AU = Submit Part B Erms = Submit Value Provide Feedback μA Determine the rms value of the electric field. Express your answer to two significant figures and include the appropriate units. Request Answer O ■ μA Value Units Request Answer ? Units ?
A python can detect thermal radiation with intensity greater than 0.60 W/m2. A typical human body has a surface area of 1.8 m2, a surface temperature of 30°C, and an emissivity e = 0.97 at infrared wavelengths. What is the maximum distance from which a python can detect your presence? You can model the human body as a point source of radiation.
Pulsed lasers produce very brief bursts of electromagnetic energy. If the laser's wavelength is 1062 nm and the pulse lasts for 38 picoseconds. How many wavelengths are found within the laser pulse? How short does a pulse need to be to fit just one wavelength? sketch the situation PLEASE. Thank you
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Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time. These devices are called pulsed lasers and can be used to ignite nuclear fusion, for example. Consider a pulsed laser that produces an electromagnetic wave with a maximum electric field strength of 1.25×10^11 V/m for a duration of 1.00 ns. What energy does it deliver on a 1.00 mm^2 area? Give your answer in units of kilojoules.
During normal beating, a heart creates a maximum 3.85-mV potential across 0.285 m of a person’s chest, creating a 1.1-Hz electromagnetic wave. During normal beating of the heart, the maximum value of the oscillating potential difference across 0.285 m of a person’s chest is 3.85 mV. This oscillating potential difference produces a 1.1-Hz electromagnetic wave. What is the wavelength, in meters, of the electromagnetic wave?
Electromagnetic waves can propagate through a vacuum. The speed of electromagnetic waves in a medium is always greater than the speed of light in vacuum. Electromagnetic waves can exhibit both particle-like and wave-like properties. The energy carried by an electromagnetic wave is directly proportional to its frequency. The electromagnetic spectrum encompasses a wide range of wavelengths, from radio waves to gamma rays. True or False ?
During normal beating, a heart creates a maximum 4.25-mV potential across 0.28 m of a person’s chest, creating a 1.2-Hz electromagnetic wave. During normal beating of the heart, the maximum value of the oscillating potential difference across 0.28 m of a person’s chest is 4.25 mV. This oscillating potential difference produces a 1.2-Hz electromagnetic wave. Part (a) What is the maximum electric field strength, in volts per meter, of the electromagnetic wave? Part (b) What is the corresponding maximum magnetic field strength, in teslas, of the electromagnetic wave? Part (c) What is the wavelength, in meters, of the electromagnetic wave?
A sinusoidal plane electromagnetic wave of frequency 20 GHz moves in the positive y direction and its electric field is directed along the z-axis. The amplitude of the electric field is 10 V/m. The start of time is chosen so that at t = 0, the electric field has a value +(10 V/m)k at the origin. a. Write the function that describes the electric field of the wave as a function of position y and time t. Hint: Among other things, you need to decide whether to use a cosine or sine function, and whether a negative sign is needed inside and/or outside the sine/cosine function. b. Explain why the electric field is not a function of the x or z coordinate. c. Find the function that describes magnetic field of the wave as a function of position y and time t.
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