Chapter 22 Reflection and Refraction of Light CHAPTER 22 Conceptual Questions C1 Three flat layers of transparent material are stacked upon one another The top layer has index of refraction n1 the middle has n2 and the bottom one has n3 If n1 n2 n3 at what angle of incidence will a ray of light traverse the three layers in a single straight line 1 a i sin 1 n1 1 b i sin 1 n1 n2 n3 1 c i tan n1 n2 n3 d There is such an angle but it is not given C2 Three flat layers of transparent material are stacked upon one another The top layer has index of refraction n1 the middle has n2 and the bottom one has n3 If n1 n2 n3 and if a ray of light strikes the top layer at an angle of incidence qi 30 in which layer is the angle of refraction the greatest a the top layer b the middle layer c the bottom layer d Once the ray enters the touching layers the angle of refraction remains constant C3 Three flat layers of transparent material are stacked upon one another The top layer has index of refraction n1 the middle n2 and the bottom one n3 If n1 n2 n3 and a ray of light in air strikes the top layer at which surface given can total internal reflection occur first a the top surface b the surface between materials with indices n1 and n2 c the surface between materials with indices n2 and n3 d Total internal reflection cannot occur at any of these surfaces C4 Light of colors 1 and 2 are sent through a prism and the rays of light of color 2 bend more Which of the following is not true a The index of refraction for color 2 is greater than that for color 1 b The two colors of light have different frequencies associated with them c The speed of light for color 2 is greater than that for color 1 in this prism d The wavelength for color 1 is different than that for color 2 in this prism C5 White light is sent through a prism and the various colors are separated in typical fashion Which of the following colors would have the highest index of refraction in this prism a red 123 Chapter 22 Reflection and Refraction of Light b green c yellow d blue 22 1 The Nature of Light 1 According to the photon energy formula tripling the frequency of the radiation from a monochromatic source will change the energy content of the individually radiated photons by what factor a 0 33 b 1 0 c 1 73 d 3 0 2 Tripling the wavelength of the radiation from a monochromatic source will change the energy content of the individually radiated photons by what factor a 0 33 b 1 0 c 1 73 d 3 0 3 Photon A has an energy of 2 0 10 19 J Photon B has 4 times the frequency of Photon A What is the energy of Photon B a 0 50 10 19 J b 1 0 10 19 J c 8 0 10 19 J d 32 10 19 J 4 According to present theories of light in some experiments light seems to be a composed of particles which can neither be created nor destroyed b a particle whose quantized energy depends on its velocity c a wave that moves from one place to another if there is material to vibrate d none of the above 5 The wave particle duality of light means that in the same experiment a light will act both like a wave and like a particle b light will act either like a wave or like a particle c light will not act like either a wave or a particle d light always exists as two waves or as two particles 124 Chapter 22 Reflection and Refraction of Light 125 Chapter 22 Reflection and Refraction of Light 6 What is the energy of a photon of frequency 5 00 1014 Hz h 6 626 10 34 J s a 3 31 10 19 J b 3 31 10 47 J c 1 33 10 48 J d 1 33 10 24 J 7 One phenomenon that demonstrates the particle nature of light is a the photoelectric effect b diffraction effects c interference effects d the prediction by Maxwell s electromagnetic theory 8 One phenomenon that demonstrates the wave nature of light is a the photoelectric effect b quantization effects c absorption of light by an electron d interference effects 9 Helium neon laser light has a wavelength in air of 632 8 nm What is the energy of a single photon in the beam h 6 626 10 34 J s and c 3 00 108 m s a 3 14 10 19 J b 5 40 10 19 J c 7 62 10 19 J d 1 15 10 18 J 10 Newton s theory of light treated light as while Young demonstrated that light behaved as with behavior a particles waves refractive b particles waves interference c waves particles interference d waves particles refractive 11 The photoelectric effect was discovered by a Maxwell b Einstein c Hertz d Planck 126 Chapter 22 Reflection and Refraction of Light 127 Chapter 22 Reflection and Refraction of Light 12 Who formulated the theory explaining the photoelectric effect a Hertz b Maxwell c Newton d Einstein 22 2 Reflection and Refraction 13 A ray of light strikes a thick sheet of glass n 1 5 at an angle of 25 with the normal Find the angle of the ray reflected off the glass surface with respect to the normal a 56 b 46 c 39 d 25 14 As the angle of incidence is increased for a ray incident on a reflecting surface the angle between the incident and reflected rays ultimately approaches what value a zero b 45 c 90 d 180 15 Which of the following describes what will happen to a light ray incident on an air to glass boundary a total reflection b total transmission c partial reflection partial transmission d partial reflection total transmission 16 Light from a 560 nm monochromatic source is incident upon the surface of fused quartz n 1 56 at an angle of 60 What is the angle of reflection from the surface a 15 b 34 c 60 d 75 17 A line representing a wave front for a wave should be drawn 128 Chapter 22 Reflection and Refraction of Light a from the source to the receiver b from one crest to the preceding crest c along one of the crests of the wave d in the direction the wave is moving 129 Chapter 22 Reflection and Refraction of Light 18 When light of one wavelength from air hits a smooth piece of glass at an angle which of the following will not occur a reflection b refraction c dispersion d All of the above will occur 19 When viewing your image in a hand held mirror if you move the …