Term

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

Definition
the orientation of oscillations in the plane perpendicular to a transversal wave’s direction of speed. 


Term

Definition
 Find the angle at which light is 100% polarized. Tan θ = n_{1}/n_{2}
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

Definition
 used to calculate the intensity of light after being polarized. I=I_{θ}cos^{2} θ where I= intensity of polarized light, I_{θ}=is the original intensity of light, θ= is the angle between the polarizer. 


Term

Definition
the phenomenon of the change in frequency that arises from the relative motion between a source and observer. 


Term
Moving SourceSpeed 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.
F^{1}=f(v/v±v_{s}), where F^{1}= observed frequency, f= actual frequency, v= speed of the source,
v_{s}=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.
F^{1}=f(v/v±v_{s}), where F^{1}= observed frequency, f= actual frequency, v= speed of the source,
v_{s}=speed of the source. Moving away (+), moving towards () 


Term

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. F^{1}=f(v±v_{s} /v), moving away source (), moving towards source (+) 

