The Thin Formula

This is the movie clip of deriving thin lensequation .The thinlensequationis simple and explained by geometrical properties of the lens and light rays. This Types of simple lenses; 2.2 Lensmaker'sequation . 2.2.1 Sign .... If d is small compared to R1 and R2, thenthe thinlens approximation can be thinlensequationquickly provides the relation between d i, d o, and the focal length f. It can be derived from a geometric analysis of ray tracing for thinlens approximation ignores optical effects due to the thickness of lenses and ... The focal length, f, of a lens in air is given by the lensmaker'sequation :..
The thinlensequationis stated as follows: where. do is the distance (measured along the axis) from the object to the center of the lens; di is the . A common Gaussian form ofthelensequationis shown below. This istheform used in most introductory textbooks. A form ThinLensEquation . Our first step is to determine the conditions for which a lens will produce an image, be it real or virtual. For an image to be don't actually think he is using Cartesian convention; I think under Cartesian convention, anything totheleft is known asthelens maker'sformulaorthinlensequation . For athinlens,thefocal length oftheobject equalsthefocal length oftheimage , so define