Focus moonlight wth a mirror system

Click For Summary
SUMMARY

The discussion centers on the feasibility of using a mirror system to focus moonlight from a house into a forest clearing. The house is positioned 5 meters above the forest floor, with the mirror located on the second floor. Participants conclude that while a primary mirror can reflect moonlight during a full moon, the varying positions of the moon throughout the month necessitate a secondary mirror system to maintain consistent focus on the primary mirror. The complexity of the moon's movement requires careful consideration of angles and positioning for effective light capture.

PREREQUISITES
  • Understanding of basic optics and reflection principles
  • Knowledge of lunar phases and moon positioning
  • Familiarity with mirror alignment techniques
  • Concepts of secondary optical systems
NEXT STEPS
  • Research lunar motion and its impact on light reflection
  • Explore designs for secondary mirror systems in optical setups
  • Study the principles of light magnification using mirrors
  • Investigate practical applications of fixed and adjustable mirror systems
USEFUL FOR

Astronomy enthusiasts, optical engineers, and authors interested in integrating scientific principles into creative writing will benefit from this discussion.

mad_sh4rk
Messages
4
Reaction score
0
Well, I'm new in town and I have a serious problem. Read the story and then tell me if its possible:

In a open spot of a forest, a kid sees a sparkle from a 150 meters Manson's window. The house is located 5 meters above the forest floor level and the open spot 1-2 meters from the floor level. The sparkle comes from a mirror in the 2nd floor of the house (5 + (3+1) m aproxim. above the forest level). Can the mirror be positioned so that the moonlight that enters the house's roof can B seen in the florest's clean spot? And without moving the mirror, can the moonlight focus on it always in the same way, every full moonlight (for example by a secondary sistem of mirrors instaled on the roof?)

Thx a lot
 
Physics news on Phys.org
Hi mad sh4rk and welcome to the forums,

It would be much appreciated in future if you would use the template as provided when submitting homework problems;
 
Yeah, what Hootenanny said. Plus in this case, if you could make a sketch of the problem, that would help a lot. Try to make it easy for us to help you. (And often doing that work helps you figure out the problem yourself anyway!)
 
Oh, and I deleted your duplicate post in the Astronomy forum. Do not multiple-post questions. This is a homework problem, and belongs here in a homework forum, and should have been posted using the homework template. Now please show us your work so we can help you.
 
Im trully sorry bout the duplicate message.
Ive got here a scheme of the problem, made by me. I hope it helps you in helping me :p
Don't forget to read the main text of the problem in the upper of the 1st page of this post, ok? Thx :wink:
 

Attachments

  • Moonlight problem1.jpg
    Moonlight problem1.jpg
    23 KB · Views: 388
I think the answers are yes and no, but I honestly don't completely grasp the problem statement. It seems like once the main mirror is fixed to reflect for one month's full moon, that the movement of other months' full moon overhead will not be lined up in a way that is conducive to getting it back lined up for the main reflector.

What do you know about how the moon moves in the sky month-by-month? How will the arcs of full moons over the house vary by month? What kind of secondary mirror system do you have in mind?
 
I don't know much about it. I know that moon position in the sky (as stars) is variable, so the mirror must B positioned in diferent angles according to the moon's positioning.

If the moon is at the left of the house, the mirror must B pointing more to the left side, the same happening with the right-sided moonlight. If the moon is behind the house, the only option is flipping the mirror to a horizontal state. If the moon is above the forest (in front of the house) the mirror must flip more towards its vertical position.

About the secondary mirror system in the roof, I wanted it to B a moonlight magnifier and simultaneously, that it could make the moonlight beam that enters the roof hole to incise the mirror always in the same way. If this was possible, the main mirror would'nt have to be oriented according to the moonlight position, as the secondary mirror system would make the light to "achieve" the mirror at the same exact point.
 
Im still waiting for the answer...I need it in order to continue writting my book!...
 

Similar threads

Replies
40
Views
4K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 26 ·
Replies
26
Views
10K
  • · Replies 1 ·
Replies
1
Views
4K
Replies
14
Views
5K
  • · Replies 16 ·
Replies
16
Views
4K
  • · Replies 1 ·
Replies
1
Views
10K
  • · Replies 29 ·
Replies
29
Views
5K
  • · Replies 13 ·
Replies
13
Views
5K
  • · Replies 65 ·
3
Replies
65
Views
11K