CHEM 111 Lecture Notes - Lecture 5: Shortwave Radio, Sound, S-Wave

• School: BYU
• Department: Chemistry and Biochemistry
• Course: CHEM 111
• Professor: David Dearden

Document Summary

Waves cause the medium they travel through to change in their equilibrium shape. What are waves? waves are a disturbance traveling through a medium the carry energy away from a source the disturbance (energy) moves along not the material! Amplitude amount of displacement from the rest position. Directly related to energy carried by classical waves brightness or loudness. Wavelength distance between identical points in adjacent wave cycles (distance between adjacent wave crests) Frequency number of wave crests that pass a point each second. Symbol: v (greek nu) sound(pitch): 20-20000 hz light(color): 10^15hz earthquake: 10-1000hz radio: set the dial: khz to mhz. Two important wave phenomena: what waves do that particles dont) Waves diffract, relative to size of slit and wave frequency. Interference the addition or subtraction of energy when two or more waves overlap constructive interference: crests add to crests, troughs add to troughs destructive interference: crests and troughs overlap and cancel each other out.