By Benjamin Crowell

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Extra resources for Discover Physics

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The taller pointer’s tip is above the water, while the shorter one’s is submerged. Measure the object and image distaces from the front surface of the tub. When I did this, I was 52 The same setup viewed from the side. pointer is directly above the other. Chapter 3 Images able to locate the image’s position to within about a millimeter, and I got good agreement between the parallax method, opening one eye at a time, and depth perception, with both eyes open. B Changing the location Make a ray diagram, showing how each ray moves through the water, is refracted, and goes off through the air.

A diverging lens tends to spread rays apart, and is thinnest in the middle. 11 Based on the rules you’ve learned for refraction, explain why light rays passing through the edges of a converging lens are bent more than ones that pass through parts closer to the center. It might seem like it should be the other way arond, since the rays at the edge pass through less glass — shouldn’t they be affected less? As part of your explanation, draw a big close-up ray diagram showing the cross-section of the lens.

2). 5 Reflection 31 Problems 1 The natives of planet Wumpus play pool using light rays on an eleven-sided table with mirrors for bumpers. Trace this shot accurately with a ruler and protractor to reveal the hidden message. b n k o Problem 1. 2 Sketch a copy of figure q on page 31. There are some places from which the image is visible, and some from which it isn’t. Show these regions on your sketch by outlining their borders and filling them with two different kinds of shading. Problem 3. g. a long fluorescent bulb).

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