6_Ch 23 College Physics ProblemCH23 Mirrors and Lenses

# 6_Ch 23 College Physics ProblemCH23 Mirrors and Lenses -...

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272 CHAPTER 23 23.4 The virtual image is as far behind the mirror as the choir is in front of the mirror. Thus, the image is 5.30 m behind the mirror. The image of the choir is from the organist. Using similar triangles, gives 0.800 m 5.30 m 6.10 m + = 6.10 m 0.600 m 0.800 m h = ( ) or 6.10 0.600 m 0.80 h m 4.58 m 0 m = = 23.5 Since the mirror is convex, 0 R < . Thus, 0.550 m R = − . With a real object, , so
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