A series of free high school Physics lectures.

All lenses and mirrors can use ray diagrams to find images. There are three principal rays. The first principal ray occurs when the light comes in parallel to the principle axis, it goes out through the focus. The second principal ray occurs when light comes in through the focus, then it comes out parallel to the principle axis. The third principal ray occurs when the light goes straight through the vertex without changing its direction

Convex Lens - Drag the Object point or Focus point and watch the ray traces and the image.

Try the free Mathway calculator and
problem solver below to practice various math topics. Try the given examples, or type in your own
problem and check your answer with the step-by-step explanations.

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