How does a plane mirror focus light rays? a) to point  b) diverging away from the mirror  c) It cannot focus the light rays

10. When you look in a plane mirror, what is true? * The image is real. The image is reversed. The image is closer to the mirror than you are. The image is farther away from the mirror than you are. L

8 a) The diagram shows two light rays that form an intermediate image by the objective lens an optical compound microscope. These rays are incident on the eyepiece lens. The focal points of the two lenses are marked. not to eyepiece lens scale objective lens to Draw rays on the diagram to show the formation of the final image. b) The object is viewed when the microscope is in normal adjustment. State what is meant by normal adjustment when applied to a compound microscope. c) The object O is placed at a distance of 24.0 mm from the objective lens and the final image is formed at a distance 240 mm from the eyepiece lens. The focal length of the objective lens is 20.0 mm and that of the eyepiece lens is 60.0 mm. The near point of the observer is at a distance of 240 mm from the eyepiece lens. Calculate the distance between the lenses.

Identify the type of mirror that best matched the description given.   When light rays reflect off                               1. Concave mirror Its surface, they diverge    When held far away from its                           2. Convex mirror surface, objects appear  smaller and upside down    Can concentrate the Suns                              3. Concave mirror rays to a focal  point so a piece of paper burns                                                          4. Neither concave or convex   mirror

Mirrors & Lenses You want to order a mirror for your bathroom which produces an upright image which is magnified by a factor of 2.0 (see chapter 23.5 for more detail about magnification) when held 20 cm from your face. Use a ray diagram to represent this situation and say what type of mirror you would need and what its focal length should be. Scientific Abilities Missing Inadequate D Needs Improvement Adequate