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| the angle between a ray that strikes a surface and the normal to that surface at the point of contact |
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| The angle formed by the line normal to the surface and the direction in which a reflected ray moves |
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| An inwardly curved mirrored that is a portion of a sphere and that converges incoming light rays |
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| An outward curved mirrored surface that isportion of a sphere and that diverges incoming light rays |
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| A transverse wave consisting of oscillating electric and magnetic fields at right angles to each other |
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| The alignment of electron magnetic waves in such a way that the vibrations of the electric fields in each of the waves are parrallel to each other |
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| An image formed when rays of light actually intersect at a single point |
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| The turning back of an electromagnetic wave at the surface of a substance |
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| An image formed by light rays that only appear to intersect |
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