exam 5,6,7 Flashcards
longitudinal is…?
parallel, compressional, and p-waves
transverse waves are…?
perdpendicular, s-waves, shear
speed of the wave
v= λf
wavenumber
k=2pie/ λ
transverse wave time graph
<—Period, T —->
time (seconds)
Transverse wave space graph
<—- Wavelength—–>
distance (meters)
y(x,t) = A sin (2π x/λ - 2πf t + φ)
A
amplitude m
y(x,t) = A sin (2π x/λ - 2πf t + φ)
λ
λ is wavelength m
y(x,t) = A sin (2π x/λ - 2πf t + φ)
f
f is frequency hz
y(x,t) = A sin (2π x/λ - 2πf t + φ)
φ
φ is phase, radians
refraction
bending toward normal when wave slows
seen in optical prism
dispersion
in phase/ no phase difference
constructive interference
out of phase
deconstructive
the difference between the two; the resulting
pulses in loudness are called
beats
can form when a wave reflects and interferes with itself; key observation is that the wave doesn’t appear to “travel,” but, instead, appears to travel up and down at certain locations.
standing wave
These waves have the same wavelength, but they are out-of-phase due to
an offset in how they started; this is may be referred to as a
phase difference
index of refraction
The ratio of the speed of light in a material to the speed in a vacuum
snells law
The relationship between the index of refraction and the change in the direction angle of the a ray as it goes across a medium is given by
