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
    6. fluorescent tube
    7. glow stick
    1. incandescent light bulb
    2. laser
    3. LED
    4. neon sign
    5. plasma display
    6. the sun
    7. red hot metal