Match the wave motion with the correct seismic wave.

P wave
S wave
Surface wave

A. motion that involves compression and expansion of the material through which it passes; may pass through solids, liquids, and gases

B. motion that involves oscillation perpendicular to the direction of propagation; only passes through solids

C. motion at Earth's surface that may move materials side to side, or up and down

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?