Physics 2 Quiz
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WAVES AND OPTICS
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A Keplerian (astronomical) refracting telescope is used to observe a distant object. The objective has focal length fo=80 cmf_o = 80 \text{ cm} and the eyepiece has focal length fe=4 cmf_e = 4 \text{ cm}, giving angular magnification ∣m∣=20|m| = 20. A second observer inserts a thin converging lens of focal length faux=40 cmf_{aux} = 40 \text{ cm} between the objective and eyepiece, placed exactly at the intermediate focal plane. How does the angular magnification change?
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