Interference in Two and Three Dimensions

Problems

practice

  1. Write something.
  2. Write something else.
  3. Write something different.
  4. Write something completely different.

conceptual

  1. Suppose you were the owner of a radio station and that you wanted to extend the range of your broadcast. Would it be wise to erect a second transmitting antenna to broadcast simultaneously with the first? How will a second transmitter affect reception?
  2. For what portion of the electromagnetic spectrum could a picket fence be used as a diffraction grating?
  3. For each of the following examples, state whether the source of light produces a continuous or discrete sprectrum …
    1. blow torch
    2. candle flame
    3. CRT
    4. emission nebula
    5. firefly
    1. fluorescent tube
    2. glow stick
    3. incandescent light bulb
    4. laser
    5. LED
    1. neon sign
    2. plasma display
    3. the sun
    4. red hot metal

numerical

  1. Two speakers are separated by 3.0 m. Each speaker emits an audible tone of wavelength 1.0 m. At what positions in between the two speakers would a person hear …
    1. constructive interference
    2. destructive interference
  2. Two speakers emitting identical tones are separated by 3.0 m. A person sits 4.0 m away from one of the speakers. The line from the person to the speaker makes a right angle with the line joining the two speakers. Determine the frequency of the lowest pure tone that will result in …
    1. constructive interference
    2. destructive interference

The Physics Hypertextbook

  • No condition is permanent.