Chapter 11: Questions

1. If the frequency of a wave is increased, what happens to its wavelength?

2. If the frequency of a wave is doubled, what happens to its wavelength?

3. If you put your fingertip in a pool of water and repeatedly move it up and down, you will create circular water waves that move out from that point. What will happen to the wavelength of these waves if you move your finger up and down more slowly (or less frequently)?

4. As a wave goes by, how far does it move during one period?

5. If the amplitude of a wave is increased 10%, what happens to the wavespeed?

6. Can a transverse wave travel along a Slinky toy?

7. Can a sound wave be polarized?

8. Can a light wave be polarized?

9. If exactly the same signal is sent to two speakers, what will a listener hear as she walks along a line parallel to the speakers (as illustrated in the nearby sketch)?

10. When standing waves are present on a string, are all the loops the same length?

11. How should you wiggle the nozzle of a water hose so the stream of water is approximately a sinusodial wave?

12. Why does the amplitude of a water wave decrease as the wave spreads out from its source?

13. How does the frequency of a wave compare to the frequency of the source that created it?

14. Carefully hold a metal rod horizontally at its mid-point. If you then strike it horizontally on its end, what kind of wave will be created in the rod? If you then strike it vertically on its end, what kind of wave will be created in the rod? Will the sound you hear be the same or different for these two cases? Why?

15. Describe some common examples of resonance.