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Galileo’s Telescope Galileo’s first telescope used a

Chapter 27, Problem 75P

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QUESTION:

Galileo's Telescope Galileo's first telescope used a convex objective lens with a focal length \(f=1.7 \mathrm{~m}\) and a concave eyepiece, as shown in Figure . When this telescope is focused on an infinitely distant object, and produces an infinitely distant image, its angular magnification is \(+3.0\).

(a) What is the focal length of the eyepiece?

(b) How far apart are the two lenses?

Equation Transcription:

Text Transcription:

f=1.7 m

+3.0

Questions & Answers

QUESTION:

Galileo's Telescope Galileo's first telescope used a convex objective lens with a focal length \(f=1.7 \mathrm{~m}\) and a concave eyepiece, as shown in Figure . When this telescope is focused on an infinitely distant object, and produces an infinitely distant image, its angular magnification is \(+3.0\).

(a) What is the focal length of the eyepiece?

(b) How far apart are the two lenses?

Equation Transcription:

Text Transcription:

f=1.7 m

+3.0

ANSWER:

Step 1 of 3

(a)

Here we need to determine the focal length of the eyepiece. The focal lengths of the objective lens is given to be  and the eyepiece be . The given telescope has angular magnification of .

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