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Optics
Vocabulary
Term | Definition |
---|---|
Lens | refracts incoming light rays |
Mirror | reflects incoming light rays |
Reflection | when light waves bounce off of a barrier/boundary between two different mediums |
Image | where light rays converge, or appear to converge, to produce a "copy" of the original object |
Focal Length | distance between the center of the lens or mirror and the focal point (f) |
Focal Point | location through which light rays converge |
Thin Lens Equation | (1/f) = (1/do) + (1/di) |
Ray Diagram | used to determine where an image will form |
Upright | vertical image |
Inverted | upside down image |
Reduced | smaller image |
Enlarged | larger, magnified image |
Real Image | when light rays converge to produce an inverted image that can be projected |
Virtual Image | when light rays appear to converge to produce an upright image that can not be projected |
Refraction | bending of a light wave as it enters a new medium at an angle; due to a change in velocity |
Convex Lens | converging lens (thicker in the middle) that bends light rays inwards towards the far focal point |
Magnification | size of an image relative to the size of the object creating it |
Magnification Equation | image distance divided by object distance (m = di/do) |
Concave Lens | diverging lens (thinner in the middle) that bends light rays away from the far focal point |
Object | source of the light rays from which an image could form |
Plane Mirror | flat mirror |
Object Distance | how far an object is from the center of a lens or mirror (do) |
Image Distance | how far an image is from the center of a lens or mirror (di) |
Object Height | how tall an object is (ho) |
Image Height | how tall an image is (hi) |
Magnitude | size or amount (number) |