AP Physics 2 C Kinetic theory Electromagnetic Waves D Classical - - PDF document

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AP Physics 2

Electromagnetic Waves

Multiple Choice www.njctl.org

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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 C Kinetic theory D Classical mechanics

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2 The wave theory of light is associated with: A Isaac Newton B Albert Einstein C Christian Huygens D Robert Milliken

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3 A beam of light has a wavelength of 600 nm in air. What is the frequency of light? (c = 3·108 m/s) A 5.0·1014 Hz B 2.0·1014 Hz C 3.0·1014 Hz D 6.0·1014 Hz

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4 A light beam changes its direction when it strikes a boundary between air and water. Which of the following is responsible for this phenomenon? A Diffraction B Polarization C Reflection D Refraction

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5 A light beam traveling in air with a wavelength of 600 nm falls on a glass block. What is the wavelength of the light beam in glass? (n = 1.5) A 500 nm B 400 nm C 600 nm D 900 nm

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6 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 = 3·108 m/s, n = 1.5) A 3.0·108 m/s B 2.0·108 m/s C 1.5·108 m/s D 4.5·108 m/s

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7 A light beam traveling in air with a wavelength of 600 nm falls on a glass block. What is the frequency of the light beam in glass? (c = 3·108 m/s, n = 1.5) A 5.0·1014 Hz B 2.5·1014 Hz C 3.0·1014 Hz D 6.0·1014 Hz

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8 Which of the following correctly orders electromagnetic radiation for increasing frequency? A Radio Waves, Visible Light, IR Radiation, UV Radiation, X- Rays, γ –Rays B γ–Rays, Visible Light, IR Radiation, UV Radiation, X-Rays, Radio Waves C Radio Waves, UV Radiation, Visible Light, IR Radiation, X- Rays, γ –Rays D Radio Waves, IR Radiation, Visible Light, UV Radiation, X- Rays, γ –Rays

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9 A light beam spreads when it travels through a narrow slit. Which

• f the following can explain this phenomenon?

A Polarization B Dispersion C Diffraction D Refraction

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10 In Young’s double-slit experiment a series of bright and dark lines was observed. Which of the following principles is responsible for this phenomenon? A Polarization B Dispersion C Interference D Refraction

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11 Which of the following electro-magnetic waves can be diffracted by a building? A Radio waves B Infrared waves C Visible light D γ-rays

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12 A blue beam of light falls on two narrow slits producing an interference pattern on a screen. If instead blue light a yellow beam

• f light is used in the same experiment, how will the interference

pattern change? A Interference fringes move close to the central maximum B Interference fringes move away from the central maximum C No change in interference D Bright fringes are replaced with dark fringes

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13 How does the interference pattern produced by a Young’s double- slit apparatus in air change when it is submerged in water? A Interference fringes move close to the central maximum B Interference fringes move away from the central maximum C No change in interference D Bright fringes are replaced with dark fringes

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14 Two coherent light waves intersect at a screen and constructively

• interfere. The extra distance traveled by one of the waves could

be: A λ/2 B λ/3 C 3λ/2 D 3λ

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15 When the distance between slits in a Young’s double-slit apparatus is increased, what happens to the interference pattern? A The distance between the maxima increases B The distance between the maxima decreases C The distance between the maxima stays the same D The pattern is replaced by one bright line from each slit.

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16 When the slit spacing in a double-slit experiment is halved, the separation between the two adjacent maxima… A is doubled B is halved C is quadrupled D is unchanged

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17 When a laser beam passes through a circular aperture, a set of bright and dark concentric circles is observed. When the aperture is increased, what happens to the interference pattern? A The separation between the circles increases B The separation between the circles decreases C The pattern is unchanged D The separation between the circles increases and then decreases

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18 Light incident on a thin film partially reflects from the film and partially transmits through the film. What is the phase difference between the reflected and transmitted waves? A 45ο B 60ο C 90ο D 180ο

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19 A light beam traveling in water enters air. What is the phase difference between the incident and transmitted waves? A 0ο B 180ο C 120ο D 90ο

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20 A beam of coherent light with a wavelength of 600 nm is incident

• n a diffraction grating with a slit separation of 1.8 µm. What is the

maximum number of spectral orders can be observed on a screen? A 1 B 2 C 3 D 11

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21 Sunlight strikes a glass prism. Which of the following light colors will be refracted the least? A Blue B Violet C Red D Yellow

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22 Unpolarized light passes through two Polaroid filters which are

• riented so that their polarization axes are rotated 60° with respect

to one another̊. If the intensity of the incident light is I0, what is the intensity of the transmitted light? A Io B Io/8 C Io/4 D 3Io/8

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23 When white light enters a glass prism, light is dispersed, creating a

• rainbow. Why do some colors of light refract more than other

colors to create this pattern? A The entry angle is different for different colors of light, so the different colors exit at different angles too 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 The index of refraction for glass changes depending on the wavelength of the light D This phenomenon does not occur

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24 A beam of light is going from air through a window at a 15 degree angle with respect to the normal line. If the angle the refracted 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 0.13 B 0.26 C 1.33 D 1.42

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25 Which of the following is true when light enters a denser medium? (Select 2 answers) A f increases B λ increases C f stays the same D v decreases

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26 Which of the following phenomena support the wave theory of light? (Select 2 answers) A Reflection B Interference C Diffraction D Projection

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27 Two coherent light waves of wavelength 400 nm intersect at a screen and destructively interfere. The difference in the distance traveled by the waves could be… (select 2 answers) A 200 nm B 300 nm C 400 nm D 600 nm

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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