Conceptual Check.
I. Sound waves can interfere, diffract, and refract.
II. Sound waves cannot be polarized because they are longitudinal.
III. The intensity level is measured in decibels (dB), defined as β = 10log₁₀(I/I₀).
IV. A change of 10 dB corresponds to a 10-fold increase in intensity.
V. Mechanical waves can travel through a vacuum if the amplitude is large enough.
