PHYS 102 Chapter Notes - Chapter 23: Curved Mirror, Plane Mirror, Refraction
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Light appears to travel in straight-line paths, called rays, at a speed that depends on the index of refraction, (cid:1866), of the material; that is: (cid:1866)=(cid:1855) Where (cid:1855) is the speed of light in a vacuum. When light reflects from a flat surface, the angle of reflection equals the angle of incidence. This law of reflection explains why mirrors can form images. In a plane mirror, the image is virtual, upright, the same size as the object, and is as far behind the mirror as the object is in front. A spherical mirror can be concave or convex. A concave spherical mirror focuses parallel rays of light (light from a very distant object) to a point called the focal point. The distance of this point from the mirror is the focal length of the mirror and: Where is the radius of curvature of the mirror.
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