Applied Physics (11th Edition)
11th Edition
ISBN: 9780134159386
Author: Dale Ewen, Neill Schurter, Erik Gundersen
Publisher: PEARSON
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Chapter 22, Problem 4RQ
What is the apparent color of a green dress in a closed room with only a red light? Explain.
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Applied Physics (11th Edition)
Ch. 22 - Prob. 1RQCh. 22 - What property of light determines its color?Ch. 22 - Name the light waves whose wavelengths are (a)...Ch. 22 - What is the apparent color of a green dress in a...Ch. 22 - Prob. 5RQCh. 22 - Prob. 6RQCh. 22 - What is a complementary color? Name the complement...Ch. 22 - How are the primary pigments related to the...Ch. 22 - Prob. 9RQCh. 22 - Prob. 10RQ
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- Can a sound wave in air be polarized? Explain.arrow_forwardA pure red object on a black background seems to disappear when illuminated with pure green light. Explain why.arrow_forwardUnreasonable Results To save money on making military aircraft invisible to radar, an inventor decides to coat them with a non-reflective material having an index of refraction of 1.20, which is between that of air and the surface of the plane. This, he reasons, should be much cheaper than designing Stealth bombers. (a) What thickness should the coating be to inhibit the reflection of 4.00-cm wavelength radar? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?arrow_forward
- A film of' oil on a puddle in a parking lot shows a variety of bright colors in swirled patches. What can you say about the thickness of the oil film? (a) It is much less than the wavelength of visible light. (b) It is on the same order of magnitude as the wavelength of visible light. (c) It is much greater than the wavelength of visible light. (d) It might have any relationship to the wavelength of visible light.arrow_forwardEquation 24.14 assumes the incident light is in air. If the light is incident from a medium of index n1 onto a medium of index n2, follow the procedure used to derive Equation 24.14 to show that tan p = n2/n1.arrow_forwardDetermine whether each of the following statements is true (T) or false (F). (a) The angle in Snell's law is measured between the ray and a line perpendicular to the surface. (b) The speed of light in a material increases as the materials index of refraction increases. (c) The ratio v/ of a photons speed to its wavelength has the same value for any index of refraction n. (d) Photons of blue light have a higher energy than photons of red light. (e) A photons energy depends on its brightness.arrow_forward
- A 2.0-mW helium-neon laser transmits a continuous beam of red light of cross-sectional area 0.25 cm2. If the beam does not diverge appreciably, how would its rms electric field vary with distance from the laser? Explain.arrow_forwardWhat happens to a light wave when it travels from air into glass? (a) Its speed remains the same. (b) Its speed increases. (c) Its wavelength increases. (d) Its wavelength remains the same. (e) Its frequency remains the same.arrow_forwardWhat is the physical significance of the Poynting vector?arrow_forward
- The Poynting vector describes a flow of energy whenever electric and magnetic fields are present. Consider a long cylindrical wire of radius r with a current I in the wire, with resistance R and voltage V. From the expressions for the electric field along the wire and the magnetic field around the wire, obtain the magnitude and direction of the Poynting vector at the surface. Show that it accounts for an energy flow into the wire from the fields around it that accounts for the Ohmic heating of the wire.arrow_forwardA 4.00-m-long pole stands vertically in a freshwater d lake having a depth of 2.00 m. The Sun is 10.0C above the horizontal. Determine the length of the poles shadow on the bottom of the lake.arrow_forwardThe waves from a radio station can reach a home receiver by two paths. One is a straight-line path from transmitter to home, a distance of 30.0 km. The second is by reflection from the ionosphere (a layer of ionized air molecules high in the atmosphere). Assume this reflection takes place at a point midway between receiver and transmitter, the wavelength broadcast by the radio station is 350 m, and no phase change occurs on reflection. Find the minimum height of the ionospheric layer that could produce destructive interference between the direct and reflected beams.arrow_forward
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Spectra Interference: Crash Course Physics #40; Author: CrashCourse;https://www.youtube.com/watch?v=-ob7foUzXaY;License: Standard YouTube License, CC-BY