PPT-Ray Diagrams Diverging Lens = Concave

Converging Lens Convex A ray of light is an extremely narrow beam of light All visible objects emit or reflect light rays in all directions Our eyes detect light rays We see images when . Textbook Reference 10.3 (P.419-430). Learning Goals. Understand how to draw ray diagrams for concave mirrors. Be able to identify when images are real or virtual. Success Criteria. To draw at least one ray diagram for concave mirrors and to identify if the image is real or virtual.. How do different lenses affect the image we see.. Starter. : how do glasses help to correct long and short sighted vision?. Key words . Lens – creates an image by refracting light . Converging lenses . Introduction to Physics II. . Class 7 – . Outline:. Ch. 23, sections . 23.6-23.8. The Thin Lens Equation . The . Lens-Maker's Equation . Image . Formation with Spherical Mirrors. Slide from http. ://hyperphysics.phy-astr.gsu.edu/hbase/vision/colcon.html. 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 and Optical Instruments . Key Points. Thin Lenses; Ray Tracing. Combinations of Lenses. The Human Eye; Corrective Lenses. Compound Microscope. References. 23. -7,8,9; 25-2,3,4,5. . Thin lenses are those whose thickness is small compared to their radius of curvature. They may be either converging (a) or diverging (b).. 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.. 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.. : . Waves and Quanta:. Lenses. Additional skills gained:. Practical Planning. Integrating GCSE content. Objectives:. Starter. : GCSE recap. You have 10mins. What effect supports the particle nature of light?. 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. Lenses. A . light ray bends as it enters glass and bends again as it leaves. . Light . passing through glass of a certain shape can form an image that appears larger, smaller, closer, or farther than the object being viewed. . Michael Fowler, . UVa. Today’s Topics. The . lensmaker’s. formula. Magnifying power. Lens combinations: ray tracing, telescopes.. Refraction at a Spherical Surface. Rays close to the axis (“paraxial”) will focus to an image inside the glass:. CLASSIFICATION OF CATARACT. Etiological classification. Congenital and developmental cataract. Acquired cataract. Senile cataract. Traumatic cataract. Complicated cataract. Metabolic cataract. Electric cataract. A laser is used to remove some tattoos. What . colour. could it be? . A mix of red, blue and green. A mix of red and green. A mix blue and white. Red. Question two. What can lasers be used for?. Removing tattoos and burning through walls.