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Understanding Mirrors and Lenses: Reflection, Images, and Light Behavior

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This chapter explores the fundamental concepts of mirrors and lenses in optics. It covers the types of mirrors—concave, convex, and plane—and explains the principles of reflection, including the laws of reflection and the differences between specular and diffuse reflection. The chapter also delves into real and virtual images, outlining their characteristics. Moreover, it describes how light behaves when it interacts with concave and convex mirrors, as well as concave and convex lenses, including the bending of light rays.

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Understanding Mirrors and Lenses: Reflection, Images, and Light Behavior

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  1. Chapter 11 - Review Science 8 – Mirrors and Lenses ANSWERS

  2. What are these mirrors called? B Concave C Convex A Plane

  3. How would the incident ray reflect off a plane mirror? Draw it. Label any rays and angles

  4. What is the name of the point where the incident ray hits the reflecting surface? Point of incidence

  5. What are the two types of reflection? Specular reflection Diffuse reflection

  6. What is the difference between diffuse reflection and specular reflection? Diffuse reflection: The light rays reflect off a rough surface in all different directions and no image is formed. Specular reflection: The light rays reflect off a smooth surface and an image is formed.

  7. Which of these would be specular reflection? Which would be diffuse reflection? • Light reflecting off a calm lake - SPECULAR • Light reflecting off a painted wall - DIFFUSE • Light reflecting off aluminum foil - DIFFUSE • Light reflecting off a shiny metal - SPECULAR

  8. What are the two laws of reflection? The angle of incidence equals the angle of reflection. 2) The incident ray, normal, and reflected ray all lie in the same plane.

  9. What is the difference between a real and virtual image? A real image can be placed on a screen, but a virtual image cannot.

  10. What are the two possible attitudes of an image? Upright Inverted

  11. What are the shapes of a concave mirror and a convex mirror?

  12. What happens to light rays that hit a concave mirror? They converge

  13. What happens to light rays that hit a convex mirror? They diverge

  14. What is the point where light rays converge? Focal point

  15. Draw the image of the ray diagram

  16. For the ray diagram, what is the size, attitude and type? Black arrow = object Red arrow = image SIZE: smaller than the object ATTITUDE: inverted TYPE: real

  17. For the ray diagram, what is the size, attitude and type? Black arrow = object Red arrow = image SIZE: larger than the object ATTITUDE: inverted TYPE: real

  18. For the ray diagram, what is the size, attitude and type? Black arrow = object Blue arrow = image SIZE: smaller than the object ATTITUDE: upright TYPE: virtual

  19. What is the line through the centre of a mirror called? Normal OR Principal axis

  20. Which type of mirror will magnify an object?(magnify = make it look larger) Concave

  21. Complete the table

  22. What happens as light travels from air to water? It refracts (bends)

  23. What do concave and convex lenses look like?

  24. Draw and describe what happens to light rays that pass through a concave lens. Diverge

  25. Draw and describe what happens to light rays that pass through a concave lens. Converge

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