When light passes from a more-dense to a less-dense medium-from glass to air, for example-the angle of refraction predicted by Snell's Law can be 90° or larger. In this case the light beam is actually reflectedback into the denser medium. This phenomenon, called total internal reflection, is the principle behind fiber optics. Snell's Law is given below.sin(01)V1sin(02)V2Set 0, = 90° in Snell's Law and solve for 0, to determine the critical angle of incidence at which total internal reflection begins to occur when light passes from glass to air. (Note that the index of refraction fromglass to air is the reciprocal of the index from air to glass. Round your answer to one decimal place.)01 =Refractionfrom airto substanceSubstanceWater1.33Alcohol1.36Glass1.52Diamond2.41

Given The refractive index of glass is n1 = 1.52. The refractive index of air is n2 = 1. When angle…

sin(82) Set 02 = 90° in Snell's Law and solve for 0, to determine the critical angle of incidence at which total internal reflection begins to occur when light passes from glass to air. (Note that the index of refraction from glass to air is the reciprocal of the index from air to glass. Round your answer to one decimal place.) Refraction from air to substance Substance Water 1.33 Alcohol 1.36 Glass 1.52 Diamond 241

sin(82) Set 02 = 90° in Snell's Law and solve for 0, to determine the critical angle of incidence at which total internal reflection begins to occur when light passes from glass to air. (Note that the index of refraction from glass to air is the reciprocal of the index from air to glass. Round your answer to one decimal place.) Refraction from air to substance Substance Water 1.33 Alcohol 1.36 Glass 1.52 Diamond 241

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter25: Reflection And Refraction Of Light

Section: Chapter Questions

Problem 1OQ

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Light traveling in a medium of index of refraction n1 is incident on another medium having an index of refraction n2. Under which of the following conditions can total internal reflection occur at the interface of the two media? (a) The indices of refraction have the relation n2 n1. (b) The indices of refraction have the relation n1 n2. (c) Light travels slower in the second medium than in the first. (d) The angle of incidence is less than the critical angle. (e) The angle of incidence must equal the angle of refraction.
The index of refraction for water is about 43. What happens as a beam of light travels from air into water? (a) Its speed increases to 43c, and its frequency decreases. (b) Its speed decreases to 34c, and its wavelength decreases by a factor of 34. (c) Its speed decreases to 34c, and its wavelength increases by a factor of 43. (d) Its speed and frequency remain the same. (e) Its speed decreases to 34c, and its frequency increases.
What 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.
Light is incident on a prism as shown in Figure P38.31. The prism, an equilateral triangle, is made of plastic with an index of refraction of 1.46 for red light and 1.49 for blue light. Assume the apex angle of the prism is 60.00. a. Sketch the approximate paths of the rays for red and blue light as they travel through and then exit the prism. b. Determine the measure of dispersion, the angle between the red and blue rays that exit the prism. Figure P38.31
Unpolarized light in vacuum is incident onto a sheet of glass with index of refraction n. The reflected and refracted rays are perpendicular to each other. Find the angle of incidence. This angle is called Brewsters angle or the polarizing angle. In this situation, the reflected light is linearly polarized, with its electric field restricted to be perpendicular to the plane containing the rays and the normal.
KEY TERMS 1. reflection (7.1) 2. ray 3. law of reflection 4. specular reflection 5. diffuse reflection 6. refraction (7.2) 7. index of refraction 8. total internal reflection 9. dispersion 10. focal length (7.3) 11. concave (converging) mirror 12. convex (diverging) mirror 13. real image 14. virtual image 15. converging lens (7.4) 16. diverging lens 17. polarization (7.5) 18. linearly polarized light 19. diffraction (7.6) 20. principle of superposition 21. constructive interference 22. destructive interference For each of the following items, fill in the number of the appropriate Key Term from the preceding list. h. _____ A change in the direction of light at a surface
Light passes from a material with index of refraction 1.3 into one with index of refraction 1.2. Compared with the incident ray, what happens to the refracted ray? (a) It bends toward the normal. (b) It is undeflected. (c) It bends away from the normal.
KEY TERMS 1. reflection (7.1) 2. ray 3. law of reflection 4. specular reflection 5. diffuse reflection 6. refraction (7.2) 7. index of refraction 8. total internal reflection 9. dispersion 10. focal length (7.3) 11. concave (converging) mirror 12. convex (diverging) mirror 13. real image 14. virtual image 15. converging lens (7.4) 16. diverging lens 17. polarization (7.5) 18. linearly polarized light 19. diffraction (7.6) 20. principle of superposition 21. constructive interference 22. destructive interference For each of the following items, fill in the number of the appropriate Key Term from the preceding list. b. _____ i = r
A ray of light strikes a flat, 2.00-cm-thick block of glass (n = 1.50) at ail angle of 30.0 with respect to the normal (Fig. P22.18). (a) Find the angle of refraction at the lop surface. (b) Find the angle of incidence at the bottom surface and the refracted angle. (c) Find the lateral distance d by which the light beam is shifted. (d) Calculate the speed of light in the glass and (e) the time required for the light to pass through the glass block. (f) Is the travel time through the block affected by the angle of incidence? Explain.
Light enters a prism of crown glass and refracts at an angle of 5.00 with respect to the normal at the interface. The crown glass has a mean index of refraction of 1.51. It is combined with one flint glass prism (n = 1.65) to produce no net deviation. a. Find the apex angle of the flint glass. b. Assume the index of refraction for violet light (v = 430 nm) is nv = 1.528 and the index of refraction for red light (r = 768 nm) is nr = 1.511 for crown glass. For flint glass using the same wavelengths, nv = 1.665 and nr = 1.645. Find the net dispersion.
How many times will the incident beam in Figure P34.33 (page 922) be reflected by each of the parallel mirrors? Figure P34.33
A common trick in fiber optics is to send several colors of light down the same fiber (this is a form of what's called multiplexing). Each color of light can carry a separate signal, letting you squeeze more information into your beam. This, of course, leaves you with the problem of how to separate the colors back out once your beam gets to where its going. One way to do this involves total internal reflection.The index of refraction of glass isn't fixed; it's actually a function of frequency. Specifically, the index of the glass n and the angular frequency ω of the light are related by (see equation in image). Since different colors of light see different indices of refraction, different colors of light will see different critical angles.Suppose we have a beam with orange light (frequency ω=3.1e+15 rad/s and red light (frequency ω=2.9e+15 rad/s traveling through this glass. Eventually it's going to hit a glass-air boundary. At what angle of incidence θ should the light hit the…