1. Lens Equations

2. Lens Equations
These are no different than the equations for spherical mirrors!!!

4. Practice Problem
If a converging lens has a focal length of 10cm and an object distance of 5 cm find the image distance and magnification.
1/5 + 1/di = 1/10
1/di= 1/10-1/5= -1/10
di= -10 cm
M= -di/do= -(-10)/5= 2
Image is virtual, Magnified and Upright

5. More Complex Lenses
For lenses that are not double concave or convex the lens makers equation can be used.
r= radius of curvature
Convex r is positive, concave r is negative
If it is flat on one side r= infinity
This will not be on the test just wanted to show the idea!!!