PPT-9.2 Reflection and Mirrors

Essential Questions What Are the Kinds of Reflections What Types of Images Do Mirrors Produce What Are the Kinds of Reflection Light obeys the law of reflection The angle of the reflection equals the angle of incidence. Science Standards Science as Inquiry Physical Science Mathematics Standards Problem Solving Communication Connection ComputationEstimation Measurement As the angle between two mirrors is increased and decreased the number of reflected images increas Optics. is the study of the behavior and properties of light.. This includes it’s interactions with objects including mirrors, lenses, and substances which reflect or scatter light.. When Light Strikes an Object. Chapter 19. Reflection. The smooth surface of the lake reflects light rays so that the observer sees an inverted image of the landscape.. Law of Reflection. The law of reflection states that the angle of reflection is equal to the angle of incidence. . A . luminous. object is one that produces light.. An . illuminated. object is one that reflects light.. Luminous Objects. Illuminated Objects. Luminous and Illuminated Objects. We see things because they . Measurements of the speed of light (c) . Index of refraction v. medium. = c/n. the bending of light – refraction . total internal reflection . Color (wavelength and frequency, c = . l. f. . Dispersion. Measurements of the speed of light (c) . Index of refraction v. medium. = c/n. the bending of light – refraction . total internal reflection . Color (wavelength and frequency, c = . l. f. . Dispersion. Measurements of the speed of light (c) . Index of refraction v. medium. = c/n. the bending of light – refraction . total internal reflection . Color (wavelength and frequency, c = . l. f. . Dispersion. Wavefronts. and Rays. In describing the . propagation of . light as a wave we need . to understand. :. wavefronts. : a surface . passing through . points of a wave . that have . the same phase . and amplitude. Clear vs. Diffuse Reflection. Specular reflection: light reflected from smooth shiny surfaces. . In specular reflection the incoming and reflected angles are equal (. . =. . ’). Diffuse reflection: light is reflected from a rough textured surface. It wasn’t until the early 19. th. century that light was theorized to behave as something other than a stream of particles.. Isaac Newton proposed the particle theory of light.. Newton’s theory was used to explain the reflection and refraction of light.. A Mirror Basic Properties. Light travels in straight “beams”. beams = the length, height, and width of light. Basic Properties. Light travels much faster than sound. Speed of light = 983,571,056 feet per second!. light. and how they can help us see . objects. How . i. s . l. ight . r. eflected?. Read the following four . explanations of how light is reflected.. Three of the explanations are false; only one of them is accurate. Geometric Optics. Understanding images and image formation, ray model of light, laws of reflection and refraction, and some simple geometry and trigonometry. The study of how light rays form images with optical instruments.