• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Focal length

Can someone tell me what sort of equation I would use for this question, I can't use the magnification as I have two unknowns. At least I don't know how to apply the magnification equation to this question.

A microscope is made in a tube 25.0cm long. It magnifies 5.00 x 10 to the 2 times, 50.0 times by the objective lens and 10 times by the eyepiece. What is the focal length of the two lenses?
 
What do you need to get greater magnification, a wider objective lens? :bugeye:
 
208
0
magnification is given by the eq. M = -q / p

see if that helps
 

Related Threads for: Focal length

  • Posted
Replies
1
Views
4K
  • Posted
Replies
2
Views
1K
  • Posted
Replies
1
Views
349
  • Posted
Replies
8
Views
508
  • Posted
Replies
1
Views
1K
  • Posted
Replies
1
Views
2K
  • Posted
Replies
2
Views
3K
  • Posted
Replies
8
Views
7K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top