PPT-Ray Diagrams for Mirrors and Lenses

We need to understand how they are constructed How light travels from the star to our eyes Understand how lenses are combined with other lenses Understand how lenses are combined with mirrors Use refraction and reflection. Concave or . C. onverging Mirrors. Ex. Inside of a spoon. Rules for Drawing Ray diagrams for curved mirrors. Start by drawing the three critical rays;. Incident ray that is . parallel to the principle axis . Unit 3:Light. Curved mirrors. Terms:. Curved mirror- can be thought of as a large number of plane mirrors all having slightly different angles. The laws of reflection still apply. Converging mirror- has a concave reflecting surface. Chapter 5, Section 7. HW: p 555 PTG 5.7 #1-6, 8 . Learning Objectives. Compare . and contrast real and virtual . images. Describe . focal length. Success Criteria. Identify the focal point and the focal length of a curved mirror. Unit 3:Light. Curved mirrors. Terms:. Curved mirror- can be thought of as a large number of plane mirrors all having slightly different angles. The laws of reflection still apply. Converging mirror- has a concave reflecting surface. The most common type of curved mirror is a spherical mirror. A spherical mirror has the shape of a section from the surface of a sphere. Curved Mirrors. Concave mirror – the inside surface of the mirror is polished. LENSES. A light ray bends as it enters glass and bends again as it leaves. This refraction is due to the difference in the average speed of light in glass and in air.. Glass of a certain shape can form an image that appears larger, smaller, closer, or farther than the object is actually viewed.. December 4. th. . REVIEW. What do you remember. ?. December 4. th. 2015 page 111. DO: I . will be able to explain the nature of waves, their behaviors and characteristics as they are manipulated by mirrors and lenses. 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. . Recognise and use key words relating to lenses:. Focus / focal point, focal length. Optic centre. Principal axis. Use ray tracing to find the location of images in lenses.. Describe the images formed in lenses.. Section 1 . Mirrors. A. . Light is necessary for eyes to see. 1. . Light waves spread in all directions from a light.. 2. . The brain interprets light waves as traveling in a straight line.. B. Plane mirror. How do eyeglasses correct your vision?. When you look in a mirror, where is the face you see?. In which ways is a cell phone camera similar to a human eye?. © 2014 Pearson Education, Inc.. Plane mirrors. Sound. Sound waves are compressional waves.. Two regions: compressions and rarefactions. Sound travels faster in liquids and solids than in gases.. Why? The molecules in liquids and solids are closer together.. A Mirror Light. Science. . . Success Criteria. Aim. I can use a mirror to reflect light and explain how mirrors work. . I can explain why mirrors are good reflectors.. I can use mirrors to reflect light onto different objects..