The eyepiece of a refracting telescope (see Fig. 34.53) has a focal length of 9.00 cm. The distance between objective and eyepiece is 1.20 m, and the final image is at infinity. What is the angular magnification of the telescope?

Short Answer

Expert verified

The angular magnification of the telescope is -12.33.

Step by step solution

01

Definition of angular magnification of the telescope

The angular magnification of the telescope is the ratio between focal length of the object and focal length of the eyepiece.

M=-f1f2

02

Calculation of angular magnification of the telescope

The summation of both focal lengths equals the distance between objective and eyepiece.

s=f1+f2f1=s-f2

Now,

M=-f1f2=-s-f1f2=1.2m-0.09m0.09m=-12.33

Thus, the angular magnification of the telescope is -12.33.

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