# Shared Flashcard Set

## Details

Waves
Terms
8
Physics
01/24/2011

Term
 Diffraction
Definition
 - the bending of light as it passes by an obstacle or through a barrier
Term
 Diffraction and Interference
Definition
 - when there are two barriers placed near each other the two diffracted waves will interface with each other, causing a pattern to form.
Term
 Polarization
Definition
 -the orientation of oscillations in the plane perpendicular to a transversal wave’s direction of speed.
Term
 Brewster’s Law
Definition
 - Find the angle at which light is 100% polarized. Tan θ = n1/n2 Where  θ= the incident angle, n2 = index of refraction of reflective material, n1 = index of refraction of the medium the wave is incident to
Term
 Malus’ Law
Definition
 - used to calculate the intensity of light after being polarized. I=Iθcos2 θ where I= intensity of polarized light, Iθ=is the original intensity of light, θ= is the angle between the polarizer.
Term
 Doppler Effect
Definition
 -the phenomenon of the change in frequency that arises from the relative motion between a source and observer.
Term
 Moving Source-Speed of the wave does not change, frequency and wavelength will change. When source moves towards the observer the frequency will increase, while wavelength will decrease. When source moves away from the observer the frequency will decrease, while wavelength will increase. F1=f(v/v±vs), where F1= observed frequency, f= actual frequency, v= speed of the source, vs=speed of the source. Moving away (+), moving towards (-)
Definition
 Speed of the wave does not change, frequency and wavelength will change. When source moves towards the observer the frequency will increase, while wavelength will decrease. When source moves away from the observer the frequency will decrease, while wavelength will increase. F1=f(v/v±vs), where F1= observed frequency, f= actual frequency, v= speed of the source, vs=speed of the source. Moving away (+), moving towards (-)
Term
 Moving Observer
Definition
 - frequency increase if the moving towards, decreases if moving away. Wavelength does not change. The actual speed of the wave does not change but to the observer the speed appears to change. F1=f(v±vs /v), moving away source (-), moving towards source (+)
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