Term
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Definition
| shows how rays change direction when they strike mirrors and pass through lenses |
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Definition
| angle the incident ray makes with a line drawn perpendicular to the surface of the mirror |
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Definition
| angle the reflected ray makes with a perpendicular line |
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Definition
| mirror with a flat surface |
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Definition
| copy of an object formed at the location from which the light rays appear to come |
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Term
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Definition
| when the inside of a curved mirror is the reflecting surface |
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Term
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Definition
| the point at which light rays meet |
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Term
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Definition
| copy of an object formed at the point where light rays actually meet |
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Term
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Definition
| outside surface of a curved mirror is the reflecting surface |
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Term
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Definition
| ratio of the speed of light in a vacuum to the speed of the light in the material |
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Term
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Definition
| object made of transparent material that has one or two curved surfaces that can refract light |
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Term
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Definition
| curved inward at the center and thickest at the outside edges |
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Term
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Definition
| curved outward at the center and thinnest at the outer edges |
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Term
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Definition
| angle of incidence that produces an angle of refraction of 900 |
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Term
| total internal reflection |
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Definition
| the complete reflection of a light ray back onto its original medium |
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Term
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Definition
| instrument that uses lenses or mirrors to collect and focus light from distant objects |
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Term
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Definition
| uses mirrors and convex lenses to collect and focus light |
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Term
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Definition
| uses convex lenses to collect and focus light |
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Term
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Definition
| optical instrument that records an image of an object |
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Term
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Definition
| optical instrument that uses lenses to provide enlarged images of very small, near objects |
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Term
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Definition
| light enters your eye through the transparent outer coating of the eye |
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Term
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Definition
| opening that allows light rays to enter your eye |
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Term
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Definition
| colored part of your eye that contracts and expands to control the amount of light that enters your eye |
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Term
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Definition
| inner surface of the back of the eye, containing light-sensitive nerve endings |
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Term
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Definition
| light-sensitive neutrons in the retina that detects low-intensity light and distinguish black, white, and gray |
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Term
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Definition
| light-sensitive neutrons in the retina that detects color |
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Term
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Definition
| an eye condition in which distant objects are blurry |
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Term
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Definition
| an eye condition that causes nearby objects to be blurry |
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Term
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Definition
| an eye condition in which objects at any distance appear blurry because of the distorted shape of the cornea |
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Term
| angle of reflection is equal to... |
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Definition
| ...the angle of incidence |
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Term
| plane mirror aways produces a... |
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Definition
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Term
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Definition
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Term
| convex mirrors always cause... |
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Definition
| light rays to spread out and can only form virtual images |
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Term
| when light enters a new medium at an angle, |
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Definition
| the change in speed causes the light to bend, or refract |
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Term
| concave lenses always cause light rays to |
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Definition
| spread out and can only form virtual images |
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Term
| convex lenses can form either |
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Definition
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Term
| materials that have small critical angles of refraction are likely to cause what? |
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Definition
| cause most of the light entering them to be totally internally reflected |
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Term
| two main types of telescopes? |
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Definition
| reflecting telescope and refracting telescope |
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Term
| light rays enter a camera through an opening and are what? |
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Definition
| are focused by the opening or lens, and form an image that is recorded on film or by a sensor |
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Term
| compound microscopes use what? |
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Definition
| two convex lenses to magnify small objects |
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Term
| what are the main parts of the eye? |
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Definition
| cornea, pupil, iris, lens, and retina |
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Term
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Definition
| nearsightedness, farsigthedness, astigmatism |
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