Problem

A person with a nearsighted eye has near and far …

03:53

Problem 59 Medium Difficulty

The Yerkes refracting telescope has a $1.00-$ -diameter objective lens of focal length 20.0 $\mathrm{m}$ . Assume it is used with an eye-piece of focal length 2.50 $\mathrm{cm} .$ (a) Determine the magnification of the planet Mars as seen through the telescope. (b) Are the observed Martian polar caps right side up or upside down?

Answer

a. 800
b. \text { inverted }

Topics

Electromagnetic Waves

Wave Optics

Book Cover for College Physics 2017

College Physics 2017

Chapter 25

Optical Instruments

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Christina K.

Rutgers, The State University of New Jersey

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University of Michigan - Ann Arbor

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University of Washington

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Video Transcript

So we have the a preacher diameter off your keys. Refracting telescope is one meter, and the focal length of the objective is 20 meter. And we're assuming that the focal length of the eyepiece is 2.5 centimeters, which is 2.5 times 10 to the negative to Witter. So, in part A, we're trying to find the magnification of the Mars on the telescope, Huh? So the magnification, if we use the definition of the magnification, is basically the ratio between the objective focal length and the eye piece for collect. So that is going to give us 20 over 2.5 times 10 to the negative two, and this is going to be 800. So the magnification is 800 and in part B and this part since standard astronomical telescope in verse, the image the observed Martian polar caps are actually upside down.

Netra S.

University of Wisconsin - Milwaukee

Topics

Electromagnetic Waves

Wave Optics

Book Cover for College Physics 2017

College Physics 2017

Chapter 25

Optical Instruments

Top Physics 103 Educators

Christina K.

Rutgers, The State University of New Jersey

Andy C.

University of Michigan - Ann Arbor

Marshall S.

University of Washington

Farnaz M.

Other Schools