# Shared Flashcard Set

## Details

Optics
Optics
12
Physics
11/14/2008

Term
 Mirror
Definition
 angle of reflection = angle of incidence (against normal/perpendicular of mirror)
Term
 Diffuse reflection
Definition
 angle of incidence varies when light reflects off a rough surface
Term
 Virtual image
Definition
 the distance of the image appearing behind the mirror is equal to the distance of the object from the mirror
Term
 Concave mirror (2)
Definition
 --> ) Archimedesif an object is outside the center of curvature, the image is inverted, smaller and real if an object is inside the focal point, it is upright, larger and virtual
Term
 Mirror Equation (-)
Definition
 1/do + 1/di = 1/fdo=object distance to center of mirror di=image distance to center of mirrorf=focal length (assign a negative to virtual image)
Term
 Convex mirror
Definition
 image is always upright, smaller and virtual
Term
 Index of Refraction, n
Definition
 n = c/vv=velocity in a medium d'/d = nair/nwater
Term
 Snells' Law (5)
Definition
 n1sinθ1=n2sinθ2light changes direction when crossing the boundary of one medium to another (refraction)larger<-towards lato light ray bends towards perpendicular normal when light ray enters a larger index of refractionsmaller->away smay light ray bends away from perpendicular normal when light ray enters a smaller index of refraction light ray's frequency remains unchanged when crossing from one medium to another (refraction)
Term
 total internal reflection
Definition
 light goes to smaller index of refraction, angle of refraction is 90o; if the angle of incidence is large enough where angle of refraction is 90o, no transmission occurs
Term
 Fiber optics
Definition
 light is transmitted even if fiber is not straight due to total internal reflection
Term
 Thin lenses
Definition
 thickness is small compared to radius of curvature
Term
 focal length of mirror
Definition
 f = r/2
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