- Observe imaging properties of a lens
- Determine a lens focal length using thin lens equation
- Determine magnification and compare to expected
The thin lens equation describes the imaging distances of a lens based on its focal length and object position. The linear magnification produced by a lens is defined as the ratio of image/object heights.
|Thin lens equation
||p - object distance
q - image distance
f - focal length
h - height
The diagram here shows the three principle rays from one point on the object. Two of these rays extend through a focus point and run parallel to the axis on the other side of the lens. The third ray extends un-deviated through the center of the lens.