Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Name:______________________________________ Mr. Hartman/Ms. Slack Period:_______ Date:________ Chapter 19 – Section 3 Refraction and Lenses Pages 562 - 566 Bending of Light Rays Objects in ____________ can sometimes look strange. A pencil in a glass of water sometimes looks as if it _________ or ____________. Illusions such as these are due to _________________________ as they pass from one material to another. The Speeds of Light The speed of light in empty space is about ______________________. Light passing through a medium such as air, water, or glass, however, travels ________ _____________ than this. This is because the atoms that make up the material interact with the light waves and _________________________. The Refraction of Light Waves If a light wave travels from one medium to another, the light wave will ____________. This can cause light to _____________________ or _____________. The bending of light waves due to a change in speed is called ___________________. Convex and Concave Lenses Taking photographs of friends or looking through a magnifying glass involves the use of a ________. A lens is a transparent object with at least _____________________ that causes light to bend. The more curved the sides of the lens are, the more light will be ______ after it enters the lens. Convex Lenses A lens that is thicker in the center than at the edges is a ____________. Because convex lenses cause light waves to meet, they are also called _________________________. The more curved the lens is, the closer the focal point is to the lens, and so the shorter the ________________. If the object is two focal lengths from the lens, the image seen through the lens is ____________ and _________________ than the object. If the object is closer to the lens than one focal length, then the image formed is _________________ and ________________ than the object. A __________________________ forms an image this way. Concave Lenses A lens that is thicker in the edges than in the middle is a _____________. A concave lens is also called a ___________________. A concave lens causes light rays to diverge so there is ________________. The image formed by a concave lens is similar to that of a ____________________. The image is ____________ and ____________ than the object. Total Internal Reflection When you look at a glass window, you can sometimes see your reflection..this is an example of ______________________. However, sometimes all the light waves that strike a boundary between two transparent materials can be reflected…this process is called _________________. The Critical Angle If a light beam in water strikes the air-water boundary at an angle greater than the _______________________, total internal reflection occurs. When this happens all the light waves are reflected just as if a __________ was there. The size of the critical angle depends on the __________________ involved….for airwater the critical angle is _____________. Optical Fibers Optical fibers are thin, flexible, ______________________ that act like a light pipe. Total internal reflection makes _______________________ in optical fibers possible. Optical fibers are used for sending light signals used in: ________________________________________________.