PHYS 251 Recitation 04: Multiple&Curved Mirrors Section Date Names Equipment needed: two plane mirrors 1. The...

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PHYS 251 Recitation 04: Multiple&Curved Mirrors Section Date Names Equipment needed: two plane mirrors 1. The Mirror a. In the set of mirrors shown below (with a 45° angle between them), locate as many images of the object as you can. (For each image you locate, label it with the number of reflections involved in each one. (The sides of the mirrors facing the object are reflective.) lb. Now with the two mirrors you have, arrange them with an object approximately like this Observe how many images you can see (and where they are). Multiple&Curved Mirrors
2. Mirror Magic a. Below is shown a plane mirror and two points labeled L and R representing your left and right sides. Show the locations of L' and R', the images of L and R in the mirror. How does this compare to facing another person? In what sense are you seeing your image "reversed" b. Some stores use two mirrors at right angles (as below). If you look straight in front of you (not off to the sides), where do you see your image? How does it compare to your image in the picture above? Why might stores use this arrangement of mirrors? c. Now observe both situations with your mirror(s) and compare to what you drew above. Multiple & Curved Mirrors
3. Curved mirrors (Ray diagrams). What happens to the image if the object moves closer to the mirror in each of the two cases below? (Show it with ray diagrams! a. For a concave mirror (object outside : As the object moves closer to the mirror, the image: b. For a concave mirror (object inside ): As the object moves closer to the mirror, the image: Multiple & Curved Mirrors
c. For a convex mirror. As the object moves closer to the mirror, the image: d. Using your ray diagrams, generalize a rule for images in curved mirrors (make sure it works for all cases!) As the object gets closer to , the image becomes and from e. You look at a toy in a curved mirror, and get the following two images of the toy as the toy moves away from the mirror. What kind of mirror is this? Where is the toy located? Toy nearer to mirror Toy farther from mirror Multiple & Curved Mirrors

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