PHYS 212 FOR SCI+ENG W/MAST PHYS >ICP<
1st Edition
ISBN: 9781323834831
Author: Knight
Publisher: PEARSON C
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Chapter 39, Problem 19EAP
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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?
Many varieties of lasers emit light in the form of pulses rather than a steady beam. A tellurium–sapphire laser can produce light at a wavelength of 800 nm in ultrashort pulses that last only 4.00 x 10-15 s (4.00 femtoseconds, or 4.00 fs). The energy in a single pulse produced by one such laser is 2.00 µJ = 2.00 x 10-6 J, and the pulses propagate in the positive x-direction. Find (a) the frequency of the light; (b) the energy and minimum energy uncertainty of a single photon in the pulse; (c) the minimum frequency uncertainty of the light in the pulse; (d) the spatial length of the pulse, in meters and as a multiple of the wavelength; (e) the momentum and minimum momentum uncertainty of a single photon in the pulse; and (f) the approximate number of photons in the pulse
Chapter 39 Solutions
PHYS 212 FOR SCI+ENG W/MAST PHYS >ICP<
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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