- #1
Sam Morse
- 15
- 0
I googled for lens formula's proof on the internet and found one here
http://www.tutorvista.com/content/physics/physics-ii/light-refraction/convex-lens-formula.php
The problem is that during the course of derivation, it is assumed that image distance is -u following the sign convention. But I don't see why we have to use to sign convention once again while solving problems in ray optics...
http://www.tutorvista.com/content/physics/physics-ii/light-refraction/convex-lens-formula.php
The problem is that during the course of derivation, it is assumed that image distance is -u following the sign convention. But I don't see why we have to use to sign convention once again while solving problems in ray optics...