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Homework Help: Physics Questions HELP !

  1. Dec 17, 2007 #1
    Physics Questions HELP!!!!!!!!!!!

    1. The problem statement, all variables and given/known data

    Questions are True or False I have my Answers but not sure if they are right.

    2. Relevant equations

    3. The attempt at a solution

    Marks: 1 As the size of an opening decreases, the amount of diffraction increases. Answer: True False

    Marks: 1 Higher frequencies of sound bend through a doorway more easily. Answer: True False

    Marks: 1 Decreasing the wavelength of the sources causes nodal lines in a two point interference pattern to move closer together. Answer: True False

    Marks: 1 The secondary maxima in single slit interference are narrower and dimmer than the central maximum. Answer: True False

    Marks: 1 Destructive interference occurs when the resultant waveform has a smaller amplitude than each individual wave. Answer: True False

    Marks: 1 Light must be a longitudinal wave since it can be polarized. Answer: True False

    Marks: 1 Nodal lines occur at points of continual constuctive interference. Answer: True False

    Marks: 1 A wave travelling along a spring with a wavelength of 2.0 m eneters a second spring where the wavelength becomes 3.0 m. If the speed in the first spring was 4.4 m/s, the speed of the wave in the second spring is:Answer: a. 6.6 m/s
    b. 2.9 m/s
    c. 0.73 m/s
    d. 2.2 m/s

    Marks: 1 The difference in path lengths from a point on a given nodal line to the two sources in a two point source interference pattern is directly proportional to the wavelength of the sources. Answer: True False

    Marks: 1 In light, longer wavelengths refract less than shorter wavelengths. Answer: True False
  2. jcsd
  3. Dec 17, 2007 #2


    User Avatar
    Gold Member

    No can do mate, you must show us your reasoning at least (some of YOUR answers would be nice too), we can't just blanketly hand out the answers!!
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