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31 Cards in this Set
- Front
- Back
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Law of Reflection |
The angle of reflection is equal to the angle of incidence. |
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Ray Diagram |
shows how rays change direction when they strike mirrors and pass through lenses. |
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Angle of incidence |
the angle the ray makes with the line drawn perpendicular to the surface of the mirror |
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Angle of reflection |
the angle the reflected ray makes with the line drawn perpendicular to the surface of the mirror |
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Plane mirror |
a mirror with a flat surface |
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virtual image |
a copy of an object formed at the location from which the the light rays appear to come. |
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concave mirror |
the "scooped out" side of a mirror (like the front) of a spoon |
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focal point |
the point at which the light rays meet. |
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real image |
the copy of a object formed at the point where light rays actually meet. can be projected on a screen |
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convex mirror |
the outside surface of a curved mirror. (like the back of the spoon) |
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index of refraction |
the ratio of the speed of the speed of light in a vacuum to the speed of light in material. |
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lens |
an object made of transparent material that has one or two curved surfaces that can refract light |
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concave lens |
a lens curved inwards towards the center. thickest at the outside edges. |
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convex lens |
curved outwards at the center and thinnest at the outer edges. |
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critical angle |
the angle of incidence which produces an angle of refraction of 90 degrees. |
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total internal reflection |
the complete reflection of a light ray back into its original medium. |
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telescope |
an instrument that uses lenses or mirrors to collect and focus light from distant objects. |
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reflecting telescope |
uses mirrors and convex lenses to collect and focus light |
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refracting telescope |
uses convex lenses to collect and focus light |
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camera |
records images of objects |
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microscope |
uses lenses to provided enlarged images of very small, near objects |
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cornea |
transparent outer coating of the eye |
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pupil |
the opening that allows light rays to enter the eye |
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iris |
the colored part of the eye |
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retina |
the inner surface of the eye |
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rods |
pick up dim light |
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cones |
pick up color, but are less sensitive (why you can't see color in dim light) |
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nearsightedness |
the image forms in front of the retina |
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farsightedness |
image forms behind the retina |
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astigmatism |
the cornea or lens is misshapen. |
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corrective lenses (glasses) |
correct the image to hit the retina |
