practice

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

conceptual

1. In our everyday environment, diffraction is much more evident for sound waves than for light waves. Why is this so? Describe a situation that could be used to verify this claim.
2. Why are TV broadcasts in the VHF range more easily received in areas of marginal reception than broadcasts in the UHF range? Remember, UHF frequencies are higher than VHF frequencies. (Assume that both types of frequencies are broadcast under identical conditions.)
3. A calculation and a related question.
   1. Verify the claim that a 2500 Hz sound wave in air has a wavelength approximately equal to the width of a typical adult human head.
   2. What is the significance of this value? That is, what kind of perceptual difference might there be between sounds above 2500 Hz and sounds below 2500 Hz? (Hint: Typical humans have two working ears.)