Hi, I have been working on this for a little while and think I am approaching it incorrectly. If someone can help, I'd really appreciate it. This is for a basic introductory calculus based Physics class that I am in.(adsbygoogle = window.adsbygoogle || []).push({});

1. Mathematically demonstrate the following equation with no numerical examples

2. [tex] \frac{1}{f_{c}} = \frac{1}{f_{1}} + \frac{1}{f_{2}} [/tex] - This is the equation for the focal distance of two touching thin lenses.

3. I have tried using the lens equation for the first and second lens, and solving for a distance of zero between them, but i can't figure out how to solve for where the image from the first lens would be, and therefore how the second lens would act on it

Thanks Very Much.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Mathematical Demonstration - Lenses in contact

**Physics Forums | Science Articles, Homework Help, Discussion**