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Solved: In 76, an eyepiece is selected to give the Moon an
Chapter 27, Problem 77P(choose chapter or problem)
QUESTION:
Problem 77P
In Problem 76, an eyepiece is selected to give the Moon an angular size of 15°. What is the focal length of this eyepiece?
Questions & Answers
QUESTION:
Problem 77P
In Problem 76, an eyepiece is selected to give the Moon an angular size of 15°. What is the focal length of this eyepiece?
ANSWER:
Step 1 of 3
Here we need to determine the focal length of the eyepiece of telescope. The angular size of Moon is given to be and the eyepiece gives to the Moon angular size .
Let the magnification of the telescope be , and the telescope has the focal lengths of the eyepiece and objective lens are and respectively.