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CPO Chapter 15 terms
Optics
| Question | Answer |
|---|---|
| converge | to bend light so that the rays come together. |
| converging lens | a type of lens that bends light so that the parallel rays coming in bend toward the focal point. |
| diverging lens | a type of lens that bends light away from the focal point. |
| Diffraction | the process by which waves can bend around corners or pass through openings. |
| focal length | the distance from the center of a lens to the focal point. |
| focal point | the point at which light rays meet after having entered a converging lens parallel to the principal axis. |
| focus | the place where all the light rays that have come from an object meet to form an image after having passed through a converging lens. |
| Image | a picture of an object that is formed using a mirror or lens where light rays from the object meet. |
| incident ray | the ray that comes from an object and strikes a surface. |
| index of refraction | a ratio that tells how much the speed of light is reduced when it passes through a material. |
| lens | a shape of a transparent material |
| normal | a line that is perpendicular to the surface of an object. |
| ray diagram | a diagram which illustrates how several light rays behave as they go through an optical system. |
| real image | an image formed by rays of light coming together on a surface like a screen or the retina of the eye. |
| reflection | the bounce of a wave off a surface. |
| refraction | occurs when light passes from one transparent material into another and bends. |
| total internal reflection | occurs when light within a material approaches the surface at greater than the critical angle and reflects back. |
| virtual image | an image formed when rays of light appear to be coming from a place other than where the actual object exists; a virtual image cannot be projected on a screen. |
| angle of incidence | direction of incoming light toward a lens, mirror or other object. |
| angle of refection | direction of light bouncing off of a mirror or other object. |
| angle of refraction | direction of light as it passes through a lens or other object. |
| Convex lens | Converging lens. Magnifying glass for example |
| Concave lense | divergent lens. Used in glasses for nearsightedness. |
| Parallel Circuit | A circuit where electricity passes through more than one pathway at the same time. |
| Potential Difference | The difference in the charge between two points in a circuit. |
| Potential Energy | Stored energy that can do work in the future |
| Power | The rate at which work is done (how fast work gets done). |
| Proton | A positively charged particle found in atoms |
| Resistance | The opposition to the flow of current in a circuit. |
| Series Circuit | A circuit where electricity passes through only one pathway. |
| Static Electricity | Electricity where the charge is not moving. When Charge builds up and moves once. |
| Volts | A unit ofthe pushing force of electricity. Also called the potential difference or electromotive force. |
| Watt | A unit of power. 746 watts equal 1 horsepower |
| Work | The result of using a force to move and object over a distance (Force * Distance) |
| Parallel | A ciruit that allows on bulb to stay lit even if the other bulb is removed. |
| Series | A ciruit where a bulb will NOT stay lit if the other bulb is removed. |
Created by:
tjmelia
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