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Chapter 5: Q8E (page 1152)
An object is 18cm from the centre of a spherical silvered-glass Christmas tree ornament 6cm in diameter. What are the position and magnification of its image?
The position is and the magnification is 0.09.
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When a thin oil film spreads out on a puddle of water, the thinnest part of the film looks dark in the resulting interference pattern. What does this tell you about the relative magnitudes of the refractive indexes of oil and water?
You take a lens and mask it so that light can pass through only the bottom half of the lens. How does the image formed by the masked lens compare to the image formed before masking?
34.19 A person swimming 0.80cm below the surface of the water in a swimming pool looks at the diving board that is directly overhead and sees the image of the board that is formed by refraction at the surface of the water. This image is a height of 5.20 m above the swimmer. What is the actual height of the diving board above the surface of the water?
Sunlight or starlight passing through the earth鈥檚 atmosphere is always ben toward the vertical. Why? Does this mean that a star is not really where it appears to be? Explain.
An interference pattern is produced by eight equally spaced narrow slits. The caption for Fig. 36.14 claims that minima occur for f =, , and/4. Draw the phasor diagram for each of these four cases, and explain why each diagram proves that there is in fact a minimum. In each case, for which pairs of slits are there totally destructive interference?
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