A telescope has an angular magnification of 250. when operated with a 20. mm eyepiece. What is the focal length of the objective?
A) 5.0 cm
B) 25. meters
C) 5000. cm
D) 5.0 meters
E) 2.5 m
D
Physics & Space Science
You might also like to view...
Small rocky bodies with compositions similar to Earth that are in orbit around the Sun are called ________
Fill in the blank(s) with correct word
Physics & Space Science
Microturbines will revolutionize the electricity industry
What will be an ideal response?
Physics & Space Science
The discovery of extra solar planets confirms Bode's law.
Answer the following statement true (T) or false (F)
Physics & Space Science
Based on the frequency with which we see comets from Earth, astronomers estimate the total number of comets in the solar system to be
A) 100 million. B) 1 billion. C) 10 billion. D) 100 billion. E) 1 trillion.
Physics & Space Science