Top Posters
Since Sunday
7
n
3
j
3
o
2
x
2
c
2
2
p
2
n
2
3
2
C
2
z
2
Home Q & A Board Science-Related Homework Help Physics
New Topic  
doit_the_clown doit_the_clown
wrote...
Go to Answer
Posts: 1408
Rep: 0 0
7 years ago
The secondary mirror of a telescope whose primary mirror is 4 meters in diameter has a diameter of 0.5 meters.  What fraction of the incoming light is obstructed by this secondary mirror?
   A)  About 1.6%    B)  About 1/8, or 12.5%    C)  About 35%    D)  About 16%
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
Read 174 times
1 Reply
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
Replies
Answer verified by a subject expert
discovererdiscoverer
wrote...
#1
Top Poster
Posts: 1374
Rep: 30 0
7 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

doit_the_clown Author
wrote...

7 years ago
Thanks
Fanmkreyol
wrote...

Yesterday
Just got PERFECT on my quiz
Smair87
wrote...

2 hours ago
Thanks for your help!!
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  938 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 749
  
 562
  
 1839
Your Opinion
What's your favorite funny biology word?
Votes: 329
Previous poll results: How often do you eat-out per week?