Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
4th Edition
ISBN: 9780134110684
Author: Randall D. Knight (Professor Emeritus)
Publisher: PEARSON
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Chapter 39, Problem 19EAP
A 1 .5-
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High-Energy Cancer Treatment. Scientists are working on a new technique to kill cancer cells by zapping them with ultrahighenergy (in the range of 1012 W) pulses of light that last for an extremely short time (a few nanoseconds). These short pulses scramble the interior of a cell without causing it to explode, as long pulses would do. We can model a typical such cell as a disk 5.0 um in diameter, with the pulse lasting for 4.0 ns with an average power of 2.0 * 1012 W. We shall assume that the energy is spread uniformly over the faces of 100 cells for each pulse. (a) How much energy is given to the cell during this pulse? (b) What is the intensity (in W/m2) delivered to the cell? (c) What are the maximum values of the electric and magnetic fields in the pulse?
A laser used in LASIK eye surgery produces 55 pulses per second. The wavelength is 220.0 nm (in air), and each pulse lasts 10.0 ps. The average power emitted by the laser is 120.0 mW and the beam diameter is 0.800 mm.
How long (in centimeters) is a single pulse of the laser in air?
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?
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Chapter 39 Solutions
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Ch. 39 - Prob. 1CQCh. 39 - Prob. 2CQCh. 39 - Prob. 3CQCh. 39 - Prob. 4CQCh. 39 - Prob. 5CQCh. 39 - Prob. 6CQCh. 39 - Prob. 1EAPCh. 39 - Prob. 2EAPCh. 39 - Prob. 3EAPCh. 39 - Prob. 4EAP
Ch. 39 - Prob. 5EAPCh. 39 - Prob. 6EAPCh. 39 - Prob. 7EAPCh. 39 - Prob. 8EAPCh. 39 - Prob. 9EAPCh. 39 - Prob. 10EAPCh. 39 - Prob. 11EAPCh. 39 - Prob. 12EAPCh. 39 - Prob. 13EAPCh. 39 - Prob. 14EAPCh. 39 - Prob. 15EAPCh. 39 - Prob. 16EAPCh. 39 - Prob. 17EAPCh. 39 - Prob. 18EAPCh. 39 - A 1 .5- m-wavelength laser pulse is transmitted...Ch. 39 - Prob. 20EAPCh. 39 - Prob. 21EAPCh. 39 - Prob. 22EAPCh. 39 - Prob. 23EAPCh. 39 - Prob. 24EAPCh. 39 - Prob. 25EAPCh. 39 - Prob. 26EAPCh. 39 - Prob. 27EAPCh. 39 - Prob. 28EAPCh. 39 - Prob. 29EAPCh. 39 - Prob. 30EAPCh. 39 - Prob. 31EAPCh. 39 - Prob. 32EAPCh. 39 - Prob. 33EAPCh. 39 - Prob. 34EAPCh. 39 - Prob. 35EAPCh. 39 - Prob. 36EAPCh. 39 - Prob. 37EAPCh. 39 - Prob. 38EAPCh. 39 - Prob. 39EAPCh. 39 - A pulse of light is created by the superposition...Ch. 39 - Prob. 41EAPCh. 39 - Prob. 42EAPCh. 39 - Prob. 43EAPCh. 39 - Prob. 44EAPCh. 39 - Prob. 45EAPCh. 39 - Prob. 46EAPCh. 39 - Prob. 47EAPCh. 39 - Prob. 48EAPCh. 39 - Prob. 49EAPCh. 39 - Prob. 50EAPCh. 39 - Prob. 51EAP
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