Lesson 1 Refraction and Lenses The Physics （1折射和镜头的物理课）.pdfVIP

Light, Refraction and Lenses Name: Light Refraction Read from Lesson 1 of the Refraction and Lenses chapter at The Physics Classroom: /Class/refrn/u14l1a.html /Class/refrn/u14l1b.html /Class/refrn/u14l1c.html /Class/refrn/u14l1f.html MOP Connection: Refraction and Lenses: sublevels 1 and 2 1. Write a one-word synonym for refraction. 2. Refraction occurs when light crosses the boundary between one material and another material. What is the primary cause for this refracting of light upon crossing a boundary? The diagram below shows the path of a light ray as it travels through air, across the air-water boundary, and through the water. Use the diagram to answer questions #3- #6. 3. On the diagram, label ... • the air-water boundary with a B • the normal line with an N • the incident ray with an I • the refracted ray with an R • the angle of incidence with a θ i • the angle of refraction with a θ r 4. How many media are there in this diagram? _____ Name them. 5. What is meant by the term medium in this context? 6. Place a noticeable dot at the location where refraction of light takes place. 7. For the three situations below, draw a normal line and measure and record the angles of incidence and the angles of refraction. θ i = θ i = θ i = θ r = θ r = θ r = 8. As light passes from one medium into another, it refracts. There is only one condition in which light will cross a boundary but not refract. State this condition. © The Physics Classroom, 2009 Page 1 Light, Re