A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 4 years ago

How large has to be the diameter of a telescope mounted to a satellite , traveling at an altitude of h=400 km , in order to resolve a tennis ball (d~10cm) ? Is it realistic? What is approximately the best resolution of google earth? I want to discuss widely over the problem.

  • This Question is Closed
  1. JamesJ
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What really matters more than diameter of the telescope is its focal length. The other you need to know is what is the smallest size image you can distinguish (e..g, \( 1 \mu m \) ). You might find this helpful on basic optics of cameras: http://www.youtube.com/watch?v=uhP3jrxraMk#!

  2. JamesJ
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    In this simple analysis, given X = width of object = 0.1 m Z = distance of object = 400,000 m x = minimum size of distinguishable object = 1 micrometer, for example, you can solve for f.

  3. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...


  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.