Unit14Concepts

# Unit14Concepts - F = R 2 Focal Length of a convex mirror F...

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My Blackboard All Blackboard Sites Home Help Logout Course Map Announcements Course Info/Calendar Unit 10 Unit 11 Unit 12 Unit 13 Unit 14 Unit 15 Unit 16 Unit 17 Unit 18 all videos My Grades Unit 14. Geometrical Optics. Major Concepts Wave Fronts The surfaces of constant phase. Rays The radial lines pointing outward from the source and perpendicular to the wave fronts. Plane Waves Waves whose wave fronts are ±at surfaces, i.e. planes. Law of Re±ection The incident ray, the re±ected ray, and the normal to the surface all lie in the same plane, and the angle of re±ection equals the angle of incidence. Virtual Image When the rays of light do not actually emanate from the image. Real Image When the rays of light actually do emanate from the image. Focal Length of a concave mirror
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Unformatted text preview: F = R / 2 Focal Length of a convex mirror F = - R / 2 The Principle of Reversibility If the direction of a light ray is reversed, the light retraces it's original path. Image Formation By a Convex Mirror Ray 1: This ray is initially parallel to the principal axis and therefore appears to originate from the focal point F of the mirror. Ray 2: This ray heads toward F , emerging parallel to the principal axis after re±ection. Ray 3: This ray travels toward the center of curvature C ; as a result, the ray strikes the mirror perpendicularly and re±ects back on itself. Mirror Equation 1/d o + 1/d i = 1/f d i is negative for an image behind the mirror, as it 1 of 1 5/16/09 12:54 PM...
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