Changes

where <math> M _1 </math> is the size of the object and <math> M _2 </math> is the size of the image.

where <math> M _1 </math> is the size of the object and <math> M _2 </math> is the size of the image.

By repeating these calculations for all lenses in the lens assembly, a final image magnification could be calculated.

By repeating these calculations for all lenses in the lens assembly, a final image magnification could be calculated.

Unfortunately, there were problems with this approximation, namely that it uses the wrong type of light. This approximation assumes that the object is a physical thing, which would allow light rays to leave it from any angle, allowing the required light rays shown in the illustration to pass through the lens. However, the light used is collimnated laser light, meaning that all the light rays are parallel when they enter the lens assembly. Therefore, this approximation is invalid.

Unfortunately, there were problems with this approximation, namely that it uses the wrong type of light. This approximation assumes that the object is a physical thing, which would allow light rays to leave it from any angle, allowing the required light rays shown in the illustration to pass through the lens. However, the light used is collimated laser light, meaning that all the light rays are parallel when they enter the lens assembly. Therefore, this approximation is invalid.

== Second Iteration ==

== Second Iteration ==

[[Image:Thin_Lenses_005_(Single_Ray).png|thumb|Two light paths, from an object off the left side of the frame. The vertical lines are the lenses. Notice how the light rays cross through the focal point and continue through to the next lens.]]

[[Image:Thin_Lenses_005_(Single_Ray).png|thumb|Two light paths, from an object off the left side of the frame. The vertical lines are the lenses. Notice how the light rays cross through the focal point and continue through to the next lens.]]

If the light entering the lens assembly is colimnated and enters the , then the top and bottom beams (the only two beams needed to locate the image) will travel through the first lens parallel, and both will cross through the focal point. The size of the image will then be

If the light entering the lens assembly is collimated and enters the , then the top and bottom beams (the only two beams needed to locate the image) will travel through the first lens parallel, and both will cross through the focal point. The size of the image will then be

<math> \frac{M _1}{f} = \frac{M _2}{L-F}</math>

<math> \frac{M _1}{f} = \frac{M _2}{L-F}</math>