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35 Cards in this Set

  • Front
  • Back
Machanical waves
needs material
Electromagnetic waves
does not need material
Transverse wave
material moves perpendicular to wave motion
Longitudinal (compressional) wave
moves parallel to wave motion
Amplitude
Distance in equaliibrium
Frequency
number of waves that pass a given point per time
Wavelength
distance between similar points on adjecent waves
Speed (equation)
V=fy
speed= Fequency x wavelength
speed of air
Vair= 331.5m/s+.6m/s/c X T
mach= 340m/s
speed of light
warp= 3 x 10^8 m/s
refraction
Bending due to change in speed through materials
*as v increases bends away from nomal
reflection
bounce bace
incoming angle= returning angle
diffraction
bending around edge
*slows down at edge
Doppler effect
change in frequency due to motion
Polarization
orientiong light in planes
Plane mirror
same size
virtual image
Convex (divering) mirror
smaller image
virtual image
appears farther away
-->(
concave (converging) mirror
At focal-no image
between focal & lense- larger (vitual-closer)
before focal- smaler to larger
(real-infront)
-->)
plane lense
same size
virtual image
concave (converging) lense
smaller image
virtual image
)(
convex (converging) lense
between focal & lense- larger/ virtual
beyond focal smaller to larger/ real
()
real image
upside down
can be projected
virtual image
right side up
cannot be projected
additive colors
red, green, blue
mixed= white
substractive colors
cyan, magenta, yellwo
mixed= black
Bow waves
2-D form a v
occur when source moves faster than waves
shock waves
3-d forms a cone
occur when source moves faster than waves
interference
wave interaction
constructive interference
waves work together
destructive interference
waves work against each other
standing waves
2 waves of equal fequency and amplitude travelling in opposite direction
Damping
reduction in amplitude as it travels out
Rectilinear Propagation
travels in straight line
spectrums
power- radiowaves- infrared- visible(roygbiv)- ultraviolet- x-rays- gamma rays- hard gamma cosmic rags
intensity
amplitude
loudness(dB)/ brighness