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# Teaching animation: Visualization of the lens equation

The interactive animation represents the geometric relationships described by the lens equation.

Click your mouse to zoom the rectangle in or out.

The animation was originally developed as a offline application for Windows and Macintosh systems and for integration into Microsoft PowerPoint slides. The online version presented here serve as a preview. The exe or app file can be downloaded free of charge from members area.

## Description

The animation contains two areas with the following content:

leftExample of an optical mapping with the most important rays
rightMathematical laws written as formulas

The focal length of the lens and the object height can be freely adjusted via two controls. All elements shown are adjusted in real time.

### Legend

$f$: Focal length of the lens
$g$: Object distance
$b$: Image distance
$G$: Object height
$B$: Image height

### Formulas

The lens equation (also Newtons equation) is:

$$\frac{1}{f} = \frac{1}{g} + \frac{1}{b}$$

$f$: Focal length of the lens
$g$: Object distance
$b$: Image distance

## General information

Title: Teaching animation: Visualization of the lens equation Teachers and lecturersIndependent learners MicrosoftÂ® WindowsÂ®MicrosoftÂ® PowerPointÂ®AppleÂ® MacintoshÂ® Resizable without the loss of visual clarityNo installation required Licensing Information

## Further animations for PCs

Reflection law

Principle of chromatic aberration

Principle of spherical aberration

Concept of numerical aperture