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A telescope is 275 mm long and has an objective lens with

Chapter 27, Problem 78P

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QUESTION:

Problem 78P

A telescope is 275 mm long and has an objective lens with a focal length of 257 mm. (a) What is the focal length of the eyepiece? (b) What is the magnification of this telescope?

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QUESTION:

Problem 78P

A telescope is 275 mm long and has an objective lens with a focal length of 257 mm. (a) What is the focal length of the eyepiece? (b) What is the magnification of this telescope?

ANSWER:

Step 1 of 3

(a)

Here we need to calculate the focal length of the eyepiece lens of the telescope. If the telescope of length  has an objective lens having focal length .

Given data,

Length,

Focal length of objective lens,

To find,

Focal length of eyepiece,

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