Problem 36.98 4 Part A A slab of glass with index of refraction n moves to the right with speed v. A flash of light is emitted at point A (see the figure(Figure 1)) and passes through the glass arriving at point B a distance away. The glass has thickness d in the reference frame where it is at rest, and the speed of light in the glass is c/n How long does it take the light to go from point A to point B according to an observer at rest with respect to points A and B? Express your answer in terms of the variables I, n, d, v, and appropriate constants. Figure glass ΕΧΕΙ ΑΣΦ ΑΣΦΑ 0 ? n(d+1) ttotal C < 1 of 1 Submit Previous Answers Request Answer B 4 X Incorrect; Try Again; 5 attempts remaining Part B Check your answer for the case v = c.
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- A laser beam shines along the surface of a block of transparent material. (See the figure ( Figure 1).) Half of the beam goes straight to a detector, while the other half travels through the block and then hits the detector. The time delay between the arrival of the two light beams at the detector is 6.40 ns. Figure n = ? -2.50 m Detector 1 of 1 Part A What is the index of refraction of this material? n = IV]| ΑΣΦ Submit Provide Feedback Request Answer ?If you were looking in a mirror while traveling at the speed of light, you would see Group of answer choices a.Your face. In your frame of reference, the light is traveling at the speed of light relative to you b.not enough information c.nothing, the light from the mirror never reaches your facePlease help
- Part A E A5.8-cm-thick layer of oil (n=1.46) is sandwiched between a 1.4-cm-thick sheet of glass and a 2.1- cm-thick sheet of polystyrene plastic (n=1.59). How long (in ms) does it take light incident perpendicular to the glass to pass through this 9.3-cm-thick sandwich? Express your answer in nanoseconds. ΜΕ ΑΣΦA ray of light is incident on the surface of a block of diamond at an angle of 43.0° with respect to the normal (a line perpendicular to the surface at the spot where the ray hits the block). A fraction of the light is reflected and the rest refracted. What is the angle (in degrees) between the reflected and refracted rays? in degrees °A ray traveling through a large vat filled with medium 1, index of refraction n₁ = 1.3, is incident on a flat layer (thickness 17 mm) of medium 2, index of refraction n₂ = 1.6. Part A If the light enters medium 2 at an angle 0₁ = 40° with respect to the normal to the interface between the media, how far is it shifted from its original path once it exits medium 2? Express your answer with the appropriate units. View Available Hint(s) l= Hint 1. How to approach the problem First, determine the distance at which the original path of the light leaves medium 2 in the direction along the layer of medium 2. Next, use Snel's law to determine how the direction of the ray changes in the medium 2 because of the refraction. Then determine where the refracted ray exits medium 2. After that determine the distance between the exit points of the original path and the refracted ray, then determine the perpendicular distance between the original path and the ray leaving medium 2. 0 ☐☐ μA Value Units ?
- PROBLEMS 10.1 Faster than light. I stand 10 feet from a white wall, holding a laser pointer. The pointer makes a red dot on the wall directly in front of me. Then with a quick flick of my wrist (lasting only 0.1 second) I twist the laser pointer by 45°, and the red dot moves 10 feet in 0.1 second. I repeat the experiment standing 20 feet from a white wall, and the red dot moves 20 feet in 0.1 second. Finally, I repeat the experiment standing 186 000 miles from a white wall, and the red dot moves 186 000 miles in 0.1 second. In other words, the red dot moves 10 times faster than light speed. Why doesn't this motion violate the speed limit derived in this chapter?In the picture to the right, a light ray traveling in Medium 1 is incident on a boundary with Medium 2. The light ray is then shown traveling into Medium 2. a) On the picture, draw the appropriate normal line. b) Does light travel faster in Medium 1, in Medium 2, or is the speed of light the same in both? Explain briefly in words. Medium 2 Medium 1A flat piece of glass covers the top of a vertical cylinder that is completely filled with water. If a ray of light traveling in the glass is incident on the interface with the water at an angle of a = 36.0°, the ray refracted into the water makes an angle of 49.0° with the normal to the interface. Part A What is the smallest value of the incident angle for which none of the ray refracts into the water? Express your answer in degrees. VE ΑΣΦ
- At the very end of Wagner's series of operas Ring of the Nibelung, Brünnhilde takes the golden ring from the finger of the dead Siegfried and throws it into the Rhine, where it sinks to the bottom of the river. Part A Assuming that the ring is small enough compared to the depth of the river to be treated as a point and that depth of the Rhine where the ring goes in is 12.8 m, what is the area of the largest circle at the surface of the water over which light from the ring could escape from the water? Use 1.33 for the index of refraction of water. Express your answer in meters squared. A = —| ΑΣΦ ? m²The critical angle for total internal reflection at a liquid-air interface is 45.0°. Part A If a ray of light traveling in the liquid has an angle of incidence at the interface of 34.0 °, what angle does the refracted ray in the air make with the normal? Express your answer in degrees. ΑΠΑΣΦ 0 = Submit Part B Request Answer 0 = ? If a ray of light traveling in air has an angle of incidence at the interface of 34.0 °, what angle does the refracted ray in the liquid make with the normal? Express your answer in degrees. —| ΑΣΦ 2 ? OYou (height of your eyes above the water, h = 1.80 m) are standing 2.00 m from the edge of a 2.50-m-deep swimming pool (Figure 1). You notice that you can barely see your cell phone, which went missing a few minutes before, on the bottom of the pool. The index of refraction of water at this temperature is 1.333. Part A How far from the side of the pool is your cell phone? Express your answer with the appropriate units. ? d = 1.841 m Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Provide Feedback gure 1 of 1 K2.00 m 2.50 m