# Use the lens formula to show that f^2 = ab

• 0 Replies
• 970 Views

0 Members and 1 Guest are viewing this topic.

#### Chikis

• Jr. Member
• 35
##### Use the lens formula to show that f^2 = ab
« on: 17/07/2014 02:41:18 »
Use the lens formula to show that $$f^2 = ab$$. $$f^2$$ = square of focal length. a = object distance. b = image distance. I need help please.
The lens formular =$$\frac{1}{f}=\frac{1}{a}+\frac{1}{b}$$
How do I do that?
« Last Edit: 17/07/2014 04:56:12 by Chikis »