waves

Question 1

oscillations

Answer 1

vibration of a particle w/in a medium

Question 2

compressions

Answer 2

areas of higher density relative to the surrounding medium in a wave

Question 3

rarefactions

Answer 3

areas of lower density relative to the surrounding medium in a wave

Question 4

progressive waves

Answer 4

unbound waves free to move a medium
the transfer of energy between 2 points

Question 5

standing waves

Answer 5

energy passed back and forth on a wave

Question 6

wave definition

Answer 6

disturbance in the form of oscillations which transfers energy and not matter

Question 7

refraction

Answer 7

when the direction of a wave changes due to it speeding up/slowing down as it passes the boundary between media

Question 8

differences and similarities between a d/s and t/s graph of waves

Answer 8

peak to peak on d/s is wavelength, whereas it is time period on t/s graph
both have the amplitude as the peak/trough

Question 9

phase difference

Answer 9

amount a wave lags behind another as a proportion of wavelength
φ/2π=x/λ

Question 10

display of an oscilloscope

Answer 10

y-axis : potential difference of trace
x-axis : timebase (cm/s) - what distance represents a specific time

Question 11

what happens to the trace of an oscilloscope when timebase increases?

Answer 11

increasing the Timebase will display more cycles of a periodic signal, so the apparent λ decreases

Question 12

what is held constant during refraction

Answer 12

frequency of wave
means {v α λ}