Chapter 29 Physics – Flashcards
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1. What type of wave is a light wave?
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Transversal
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2. Can polarization occur with a sound wave? Ever?
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NO
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3. What type of wave is a sound wave?
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Longitudinal
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4. Polaroid filters appear dark when they are
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perpendicular
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5. If the axes of a pair of Polaroids are ? or at a ?degree angle to each other then light ? pass through them.
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parallel, 45, will
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6. Light emitted by a candle, a lamp or the Sun is
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NOT POLORIZED
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7. Glare seen from water or even the street is largely
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Horizontal
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8. The polarization axes in sunglasses are
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vertical
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9. A pair of perpendicularly crossed Polaroids can transmit light only if
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A THIRD POLOROID AT 45 DEGREES IS BETWEEN THE TWO
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? employ the principle of diffraction and ? since there are simply a complex ?
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holograms interference diffraction grating
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11. How can a hologram be magnified?
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View with light with longer wave length
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12. According to Huygens' principle, every point on a wave behaves as a source for
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New Waves
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13. Huygens' principles to both waves of
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refraction and reflection
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? opening though which waves fan out would produce more pronounced waves than a ? opening.
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small large
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15. Diffraction can be observed when a wave passes through a ? opening and the ? of an object.
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small edge
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16. True or False: Two waves cannot exist in the same place
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false
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17. Which can diffract more, long wavelengths or short ones?
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Long
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18. (AM/FM) radio waves diffract around buildings.
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AM
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19. What type of sounds does a dolphin emit?
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High Frequency
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20. When is diffraction a hindrance and when is it helpful? (think large and small)
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Helpful-Radio wave bending around a building Hindrance- Microscope is too blurry because it is too small
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21. A ? can separate light into its component colors.
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diffraction grating
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22. Diffraction can be reduced when illumination is with an
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electron beam
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23. Cancellation and reinforcement is produced by the ? of waves.
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Superposition
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24. Constructive interference due to the superposition of identical waves causes a doubling of the wave's
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Amplitude
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25. Light of a single frequency, wavelength and color is known as ? light.
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monochromatic
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26. The wave nature of light was finally proven with Thomas Young's ? demonstration.
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two source interference pattern
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27. When waves from a pair of closely-spaced slits arrive in phase a ? is produced.
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bright fringe
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28. When waves from a pair of closely-spaced slits arrive out of phase a ? is produced.
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dark fringe
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29. Iridescent colors in the soap bubbles, in thin films of gasoline on top of water and the inside of sea shells are due to
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Interference
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30. Interference colors in a soap bubble are evidence that the soap film is ? and has ? reflecting surfaces.
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thin 2
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31. If a long-wavelength is seen in a soap bubble, then the wavelength being cancelled must be relatively
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short
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32. If you and your friend are looking at opposite sides of a soap bubble do you see the same color?
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no
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33. If a thin film appears cyan when illuminated with white light, then the color being cancelled is
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red
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34. If a thin film appears yellow when illuminated with white light, then the color being cancelled is
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blue
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35. If a thin film appears magenta when illuminated with white light, then the color being cancelled is
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green
