PPT-10.7 – THIN CONVEX lenses

Also called why the human eye is spherical instead of flat Ever wondered Objectives WWBAT Describe how an image is formed by a thin convex lens Determine the location of image formation for a thin convex lens. Physics 2415 Lecture 33. Michael Fowler, . UVa. Today’s Topics. A bit more about mirrors…. Refraction. Lenses. Ray tracing to locate image. Concave Mirror Focusing Sunlight. This solar collector is really many small flat mirrors, but equivalent to a concave mirror focusing parallel rays to a point half way from the center of the mirror to its center of curvature.. . How Do Your Eyes Help You See?. A lens is a curved surface, like a piece of glass or plastic.. Its curved shape makes light bend.. Lenses can make objects appear bigger or smaller to our eyes.. What is a lens?. Lenses. A . convex lens. (or a . converging lens. ) converges parallel light rays passing through it.. Various shapes of convex lenses. Terms for describing lenses. Optical centre. is the centre of a lens.. 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.. . How Do Your Eyes Help You See?. A lens is a curved surface, like a piece of glass or plastic.. Its curved shape makes light bend.. Lenses can make objects appear bigger or smaller to our eyes.. What is a lens?. Light. Light Energy. Light Energy. Energy is the ability to cause things to change. Light is a type of energy. Without light no one can see anything. Light gives things color. Light shines on plants and makes them grow. Some doctors use light energy to perform operations with lasers. Light energy can make cars move. Satellites turn light into electricity in space.. S4P1 Students will investigate the nature of light using tools such as mirrors, lenses, and prisms. ..  . c. . Identify the physical attributes of a convex lens, a concave lens, and a prism and where each is used. . 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. Lenses. A transparent object used to change the path of light. Examples: . Human eye. Eye glasses. Camera. Microscope. Telescope. Reading stones used by monks, nuns, and scholars ~1000 C.E.. Lenses . 12.2 Refraction of Light. 12.3 Total Internal Reflection. 12.4 Refraction by Thin Lenses. 12.5 Ray Diagrams for Thin Converging Lenses. Chapter 12 Light. 12.4 Refraction by Thin Lenses. Learning Outcomes. Transparent/Translucent/Opaque. WS. Take out NASA picture (from Friday). Homework: Read & take notes on chapter 23, section 3 (last one - you finished the book). Review & reinforce Study Island & Skills Tutor due Thursday. Reading and Math Skills Tutor due Friday (last one).. A differentiated lab to test you skill with lab reports and geometric optics. Ray Tracing for Lenses. Lenses are used to focus light and form images. There are a variety of possible types; we will consider only the symmetric ones, the double concave and the double convex.. Michael Fowler, . UVa. Today’s Topics. A bit more about mirrors…. Refraction. Lenses. Ray tracing to locate image. Concave Mirror Focusing Sunlight. This solar collector is really many small flat mirrors, but equivalent to a concave mirror focusing parallel rays to a point half way from the center of the mirror to its center of curvature.. What is refraction?. What causes refraction?. What are some examples of refraction of light that show why it is important?. Refraction of Light - Defined. Refraction of light occurs when a light wave moves from a vacuum (or a medium) into another medium (or a vacuum). When a wave changes media, its ____________ changes..