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Lectur24_Kim

# Lectur24_Kim - Lecture 24-1 Polarization by Reflection 1 2...

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Unformatted text preview: Lecture 24-1 Polarization by Reflection 1 2 2 2 2 1 2 2 2 1 sin sin 90 180 90 sin sin 90 sin tan P o P P P P P P n n n n n n n Brewster’s Law Definition of Brewster angle or polarizing angle P 1 2 2 1 1.33 , 53.1 1.5 , 56.3 P P n air n water n glass Lecture 24-2 Plane Mirror A point object is at a distance s from a plane (or flat) mirror. The rays from the object are reflected by the mirror and the reflected rays diverge. • Since no rays actually go through the image, it is called a virtual image. • The image distance s’ is equal to the object distance s in magnitude but is opposite in sign because the image is virtual, i.e., s’ = - s . However, the extensions of the reflected rays all intersect at a point behind the mirror, forming the image . • Image has the same height and orientation as the object. Lecture 24-3 “ Full Length” Mirror 1 2 FG BC AC 1 2 GH CD CE 1 1 2 2 FH AC CE AE Only half the object (and image) size is needed. Lecture 24-4 Physics 241 – Question 1 – November 17, 2011 A man is standing still in front of a mirror, and the mirror is moved toward him at 1 m/s. What is the speed of the man’s image relative to the ground? a) 0.5 m/s b) 1 m/s c) 1.5 m/s d) 2 m/s e) 2.5 m/s Lecture 24-5 Multiple Plane Mirrors - Demo depth-inversion twice at P” 12 “ correct” image! equidistant Lecture 24-6 r r s s s’ f f f is the focal length . Concave Mirror Convex Mirror Spherical Mirrors • concave mirror: the geometrical center is on the same side of the mirror as the object. • convex mirror: the geometrical center is on the opposite side of the mirror as the object....
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Lectur24_Kim - Lecture 24-1 Polarization by Reflection 1 2...

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