ASTRONOMY 2 THIRD HOUR SESSION “E”	NAME
ACTIVITY: Introduction to Telescopes and Binoculars	DATE	ID#

1. List the three ‘powers’ of a telescope discussed in class.

2. What is the magnification power of the binoculars in the lab?

3. What is the magnification power of the “refractor” displayed at the front of the lab?

4. What is the magnification power of the “reflector” displayed at the front of the lab?

5. How much (times) more light gathering power do the binoculars have in comparision to your eye (D_o = 7 mm)?

6. How much (times) more light gathering power does the telescope with the largest objective lens displayed have in comparison to the binoculars (using one eye)?

7. Which of the two “displayed” telescopes (refractor or reflector) has more resolving power and by what factor?

8. Suppose two sunspots on the Sun were __________ apart from each other as seen by someone on Earth. Could the telescope in question #7 (with the higher resolving power) resolve these two objects?

9. Is a _______ mm eyepiece a wise choice for use in a telescope with an F_o = 2000 mm and D_o = _____ inches? Why?

10. If the Apparent Field of View (AF) of a _______ mm eyepiece is _____°, and F_o is 2000 mm, what is the magnification (M) and True FOV (TF), respectively?

11. If the AF of a ______ mm eyepiece is 44°, and F_o is 2000 mm, what is the M and TF, respectively?

12. If a pair of binoculars has a TF = ______° and the angular size of the Beehive Cluster is 1.5°, what will give the best view of the entire cluster: A) the binoculars; B) the telescope/eyepiece combination in Question 10; or C) the telescope/ eyepiece combination in question 11?

13. If the AF of an eyepiece is ______° and the F_o is 2000 mm, what is the M and eyepiece focal length (F_e), respectively, that will just fit the Beehive Cluster in the FOV?