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The Moon has an angular size of 0.50° when viewed with

Chapter 27, Problem 76P

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QUESTION:

Problem 76P

The Moon has an angular size of 0.50° when viewed with unaided vision from Earth. Suppose the Moon is viewed through a telescope with an objective whose focal length is 53 cm and an eyepiece whose focal length is 25 mm. What is the angular size of the Moon as seen through this telescope?

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QUESTION:

Problem 76P

The Moon has an angular size of 0.50° when viewed with unaided vision from Earth. Suppose the Moon is viewed through a telescope with an objective whose focal length is 53 cm and an eyepiece whose focal length is 25 mm. What is the angular size of the Moon as seen through this telescope?

ANSWER:

Step 1 of 3

Here we need to determine the angular size of the Moon when seen through the telescope. The telescope has the focal lengths of the eyepiece and objective lens are  and  respectively. The angular size of Moon is given to be .

Let the magnification of the telescope be  and the angular size of Moon when seen through telescope is .

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