College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Chapter 23, Problem 18P
High-energy cancer treatment. Scientists are working on a new technique to kill cancer cells by zapping them with ultrahigh-energy (in the range of 1012 W) pulses of
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Scientists are working on a new technique to kill cancer cells by zapping them
with ultrahigh-energy (in the range of 1.00×1012 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 5.00 μm in diameter, with the pulse lasting
for 4.00 ns with an average power of 2.00×1012 W. We shall assume that the
energy is spread uniformly over the faces of 100 cells for each pulse.
I 1.00×1021 W/m²
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The most energetic electromagnetic waves in the universe are gamma-rays from gamma ray bursts (GRBs) from collapsing massive stars, observed by satellites with expected energies of 100 TeV (1 TeV = 1012eV).
1. What is the frequency of these energetic gamma ray photons? 1 eV = 1.60 x 10-19 J.
2. What is the wavelength?
Assume that when I was 30 years old, I invented a spaceship capable of traveling at 95% of the speed of light, and take off to survey a peculiar infrared star 10 light years from earth. My daughter is 2 years old when I leave earth. I calculate that I age 20 years on my mission.
A. while traveling to the star at 95% of the speed of light, I measure the wavelength of its light at 450 nm. What is the actual wavelength of the star's light?
B. I turn around and head back to earth at 95% of the speed of light. WHat is the wavelength I see and I move away from the star?
C. From my daughter prespective, how old is she when I return?
Chapter 23 Solutions
College Physics (10th Edition)
Ch. 23 - Prob. 1CQCh. 23 - Why is the average radiation pressure on a...Ch. 23 - Prob. 3CQCh. 23 - How does the refraction of light account for the...Ch. 23 - Light requires about 8 min to travel from the sun...Ch. 23 - Prob. 6CQCh. 23 - A student claimed that, because of atmospheric...Ch. 23 - If you look at your pet fish through the corner of...Ch. 23 - How could you determine the direction of the...Ch. 23 - In three-dimensional movies, two images are...
Ch. 23 - Prob. 11CQCh. 23 - When light is incident on an interface between two...Ch. 23 - A ray is traveling in material a when it reaches...Ch. 23 - Unpolarized light with an original intensity I0...Ch. 23 - Prob. 3MCPCh. 23 - If a sinusoidal electromagnetic wave with...Ch. 23 - A plane electromagnetic wave is traveling...Ch. 23 - A ray of light going from one material into...Ch. 23 - Which of the following statements about radio...Ch. 23 - Two lasers each produce 2 mW beams. The beam of...Ch. 23 - A ray of light follows the path shown in Figure...Ch. 23 - A light beam has a wavelength of 300 nm in a...Ch. 23 - Prob. 11MCPCh. 23 - Prob. 12MCPCh. 23 - When a solar flare erupts on the surface of the...Ch. 23 - The microprocessor in a modern laptop computer...Ch. 23 - (a) How much time does it take light to travel...Ch. 23 - A geostationary communications satellite orbits...Ch. 23 - Prob. 5PCh. 23 - Prob. 6PCh. 23 - Prob. 7PCh. 23 - Prob. 8PCh. 23 - Visible light. The wavelength of visible light...Ch. 23 - Prob. 10PCh. 23 - Medical x rays. Medical x rays are taken with...Ch. 23 - Prob. 12PCh. 23 - Prob. 13PCh. 23 - Prob. 14PCh. 23 - Prob. 15PCh. 23 - Laboratory lasers. HeNe lasers are often used in...Ch. 23 - Prob. 17PCh. 23 - High-energy cancer treatment. Scientists are...Ch. 23 - Prob. 19PCh. 23 - The intensity at a certain distance from a bright...Ch. 23 - A sinusoidal electromagnetic wave from a radio...Ch. 23 - Prob. 22PCh. 23 - Prob. 23PCh. 23 - A sinusoidal electromagnetic wave emitted by a...Ch. 23 - Two plane mirrors intersect at right angles. A...Ch. 23 - Two plane mirrors A and 8 intersect at a 45 angle....Ch. 23 - Prove that when a ray of light travels at any...Ch. 23 - A light beam travels at 1.94 108 m/s in quartz....Ch. 23 - Prob. 29PCh. 23 - Light with a frequency of 5.80 1014 Hz travels in...Ch. 23 - Prob. 31PCh. 23 - Light inside the eye. The vitreous humor, a...Ch. 23 - Prob. 33PCh. 23 - A 1 55-m-tall fisherman stands at the edge of a...Ch. 23 - A light ray passes through a rectangular slab of...Ch. 23 - A glass plate having parallel faces and a...Ch. 23 - A beam of light in air makes an angle of 47.5 with...Ch. 23 - Reversibility of rays. Ray 1 of light in medium a...Ch. 23 - You (height of your eyes above the water. 1.75 m)...Ch. 23 - A parallel-sided plate of glass having a...Ch. 23 - As shown in Figure 23.53, a layer of water covers...Ch. 23 - A ray of light in diamond (index of refraction...Ch. 23 - The critical angle for total internal reflection...Ch. 23 - A ray of light is traveling in a glass cube that...Ch. 23 - Light is incident along the normal to face AB of a...Ch. 23 - Light pipe. Light enters a solid tube made of...Ch. 23 - Prob. 47PCh. 23 - A beam of light strikes a sheet of glass at an...Ch. 23 - The table gives the index of refraction of fused...Ch. 23 - Use the graph in Figure 23.29 for silicate flint...Ch. 23 - The indices of refraction for violet light ( = 400...Ch. 23 - Unpolarized light with intensity I0 is incident on...Ch. 23 - Unpolarized light is incident on two ideal...Ch. 23 - A beam of unpolarized light of intensity I0 passes...Ch. 23 - Three ideal polarizing filters are stacked, with...Ch. 23 - Light of original intensity I0 passes through two...Ch. 23 - The polarizing angle for light in air incident on...Ch. 23 - A beam of polarized light passes through a...Ch. 23 - A beam of unpolarized light in air is incident at...Ch. 23 - Plane-polarized light passes through two...Ch. 23 - The energy flow to the earth from sunlight is...Ch. 23 - Prob. 62GPCh. 23 - A powerful searchlight shines on a man. The mans...Ch. 23 - Prob. 64GPCh. 23 - Prob. 65GPCh. 23 - Prob. 66GPCh. 23 - Solar sail. NASA is doing research on the concept...Ch. 23 - A thick layer of oil is floating on the surface of...Ch. 23 - Prob. 69GPCh. 23 - A light ray in air strikes the right-angle prism...Ch. 23 - A ray of light is incident in air on a block of a...Ch. 23 - A light beam is directed parallel to the axis of a...Ch. 23 - Heart sonogram. Physicians use high-frequency (f =...Ch. 23 - A light ray refracts through a glass block having...Ch. 23 - A beaker with a mirrored bottom is filled with a...Ch. 23 - A ray of light traveling in a block of glass (n =...Ch. 23 - In a physics lab, light with wavelength 490 nm...Ch. 23 - The refractive index of a certain glass is 1.66....Ch. 23 - A thin layer of ice (n = 1.309) floats on the...Ch. 23 - Optical activity of biological molecules. Many...Ch. 23 - Passage Problems Safe exposure to electromagnetic...Ch. 23 - Doubling the frequency of a wave in the range of...Ch. 23 - The ICNIRP also has guidelines for magnetic-field...Ch. 23 - First, light with a plane of polarization at 45 to...Ch. 23 - Prob. 85PPCh. 23 - To vary the angle as well as the intensity of...
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