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$\cdot$ A thin lens with a focal length of 6.00 $\mathrm{cm}$ is used as a sim-ple magnifier. (a) What angular magnification is obtainable with the lens if the object is at the focal point? (b) When an object is examined through the lens, how close can it be brought to the lens? Assume that the image viewed by the eye is at infinity and that the lens is very close to the eye.

a) 4.167b) 6 $\mathrm{cm}$

Physics 102 Electricity and Magnetism

Physics 103

Chapter 25

Optical Instruments

Electromagnetic Waves

Reflection and Refraction of Light

Rutgers, The State University of New Jersey

University of Michigan - Ann Arbor

University of Sheffield

University of Winnipeg

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Okay, so we're assuming that the image is at infinity. And so when that is the case, Ah, the angular magnification is equal to 25 centimeters over focal ing, and that is 25 over six. And so he have 4.17 And in part B, um, the object can be brought as close as the focal length, which is six centimeters. In other words, the focal point, and that's it.

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