Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.
In this lesson, we will learn how to calculate the imaging properties of reflecting, refracting, and compound optical systems used in telescopes.
Q1:
What is the angular magnification of a telescope that has a 100 cm-focal length objective and a 2.50 cm-focal length eyepiece?
Q2:
A 7.5x binocular produces an angular magnification of − 7 . 5 0 , acting like a telescope. (Mirrors are used to make the image upright.) If the binoculars have objective lenses with a 75.0-cm focal length, what is the focal length of the eyepiece lenses?
Q3:
Two stars that are 1 0 9 km apart are viewed by a telescope and found to be separated by an angle of 1 0 − 5 radians . If the eyepiece of the telescope has a focal length of 1.5 cm and the objective has a focal length of 3 meters, how far away are the stars from the observer?
Don’t have an account? Sign Up
