Slide 1 / 29 Slide 2 / 29 1 Which of the following theories can explain the bending of waves behind obstacles into “shadow region”? A Particle theory of light B Wave theory of light AP Physics 2 C Kinetic theory Electromagnetic Waves D Classical mechanics Multiple Choice www.njctl.org Slide 3 / 29 Slide 4 / 29 2 The wave theory of light is associated with: 3 A beam of light has a wavelength of 600 nm in air. What is the frequency of light? (c = 3·10 8 m/s) A Isaac Newton A 5.0·10 14 Hz B Albert Einstein B 2.0·10 14 Hz C Christian Huygens C 3.0·10 14 Hz D Robert Milliken D 6.0·10 14 Hz Slide 5 / 29 Slide 6 / 29 4 A light beam changes its direction when it strikes a boundary 5 A light beam traveling in air with a wavelength of 600 nm falls on a between air and water. Which of the following is responsible for this glass block. What is the wavelength of the light beam in glass? (n phenomenon? = 1.5) A Diffraction A 500 nm B Polarization B 400 nm C Reflection C 600 nm D Refraction D 900 nm
Slide 7 / 29 Slide 8 / 29 6 A light beam traveling in air with a wavelength of 600 nm falls on a 7 A light beam traveling in air with a wavelength of 600 nm falls on a glass block. What is the speed of the light beam in glass? (c = glass block. What is the frequency of the light beam in glass? (c = 3·10 8 m/s, n = 1.5) 3·10 8 m/s, n = 1.5) A 3.0·10 8 m/s A 5.0·10 14 Hz B 2.0·10 8 m/s B 2.5·10 14 Hz C 1.5·10 8 m/s C 3.0·10 14 Hz D 4.5·10 8 m/s D 6.0·10 14 Hz Slide 9 / 29 Slide 10 / 29 8 Which of the following correctly orders electromagnetic radiation 9 A light beam spreads when it travels through a narrow slit. Which for increasing frequency? of the following can explain this phenomenon? A Radio Waves, Visible Light, IR Radiation, UV Radiation, X- Rays, γ –Rays A Polarization B γ–Rays, Visible Light, IR Radiation, UV Radiation, X-Rays, B Dispersion Radio Waves C Diffraction C Radio Waves, UV Radiation, Visible Light, IR Radiation, X- Rays, γ –Rays D Refraction D Radio Waves, IR Radiation, Visible Light, UV Radiation, X- Rays, γ –Rays Slide 11 / 29 Slide 12 / 29 10 In Young’s double-slit experiment a series of bright and dark lines 11 Which of the following electro-magnetic waves can be diffracted by was observed. Which of the following principles is responsible for a building? this phenomenon? A Radio waves A Polarization B Infrared waves B Dispersion C Visible light C Interference D γ-rays D Refraction
Slide 13 / 29 Slide 14 / 29 12 A blue beam of light falls on two narrow slits producing an 13 How does the interference pattern produced by a Young’s double- interference pattern on a screen. If instead blue light a yellow beam slit apparatus in air change when it is submerged in water? of light is used in the same experiment, how will the interference pattern change? A Interference fringes move close to the central maximum A Interference fringes move close to the central maximum B Interference fringes move away from the central maximum B Interference fringes move away from the central maximum C No change in interference C No change in interference D Bright fringes are replaced with dark fringes D Bright fringes are replaced with dark fringes Slide 15 / 29 Slide 16 / 29 14 Two coherent light waves intersect at a screen and constructively 15 When the distance between slits in a Young’s double-slit apparatus interfere. The extra distance traveled by one of the waves could is increased, what happens to the interference pattern? be: A The distance between the maxima increases A λ/2 B The distance between the maxima decreases B λ/3 C The distance between the maxima stays the same C 3λ/2 D The pattern is replaced by one bright line from each slit. D 3λ Slide 17 / 29 Slide 18 / 29 16 When the slit spacing in a double-slit experiment is halved, the 17 When a laser beam passes through a circular aperture, a set of separation between the two adjacent maxima… bright and dark concentric circles is observed. When the aperture is increased, what happens to the interference pattern? A is doubled A The separation between the circles increases B is halved B The separation between the circles decreases C is quadrupled C The pattern is unchanged D is unchanged D The separation between the circles increases and then decreases
Slide 19 / 29 Slide 20 / 29 18 Light incident on a thin film partially reflects from the film and 19 A light beam traveling in water enters air. What is the phase partially transmits through the film. What is the phase difference difference between the incident and transmitted waves? between the reflected and transmitted waves? A 0 ο A 45 ο B 180 ο B 60 ο C 120 ο C 90 ο D 90 ο D 180 ο Slide 21 / 29 Slide 22 / 29 20 A beam of coherent light with a wavelength of 600 nm is incident 21 Sunlight strikes a glass prism. Which of the following light colors on a diffraction grating with a slit separation of 1.8 µm. What is the will be refracted the least? maximum number of spectral orders can be observed on a screen? A Blue A 1 B Violet B 2 C Red C 3 D Yellow D 11 Slide 23 / 29 Slide 24 / 29 22 Unpolarized light passes through two Polaroid filters which are 23 When white light enters a glass prism, light is dispersed, creating a oriented so that their polarization axes are rotated 60° with respect rainbow. Why do some colors of light refract more than other to one another̊. If the intensity of the incident light is I 0 , what is the colors to create this pattern? intensity of the transmitted light? A The entry angle is different for different colors of light, so the A Io different colors exit at different angles too B Io/8 B The surface of the prism that the light exits from is curved, so the angles the light makes with the normal line are all different C Io/4 D 3Io/8 C The index of refraction for glass changes depending on the wavelength of the light D This phenomenon does not occur
Slide 25 / 29 Slide 26 / 29 24 A beam of light is going from air through a window at a 15 degree 25 Which of the following is true when light enters a denser medium? angle with respect to the normal line. If the angle the refracted (Select 2 answers) beam makes with the normal line is is 4.5 degrees less than the incident angle, what is the index of refraction of the glass? A f increases A 0.13 B λ increases B 0.26 C f stays the same C 1.33 D v decreases D 1.42 Slide 27 / 29 Slide 28 / 29 26 Which of the following phenomena support the wave theory of 27 Two coherent light waves of wavelength 400 nm intersect at a light? (Select 2 answers) screen and destructively interfere. The difference in the distance traveled by the waves could be… (select 2 answers) A Reflection A 200 nm B Interference B 300 nm C Diffraction C 400 nm D Projection D 600 nm Slide 29 / 29 28 Which of the following phenomena can separate white light into its constituent colors? (select 2 answers) A Diffusion B Reflection C Interference D Dispersion
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