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Guide to the Optics Bench
Elements can be added to the optics bench by clicking on the appropriate button and then clicking inside the applet at the desired location.
Beam - adds a beam of parallel light rays. The angle of the light rays can be changed by dragging the hotspot after clicking on the beam.
Object - adds an arrow as an object. A ray diagram is drawn for the object if an optical element is present.
Source - adds a point source of light. The spread of the light ways can be adjusted by dragging the hotspot after clicking on the source.
Lens - adds a lens to the optics bench. The focal point can be adjusted by dragging the hotspots after clicking on the lens. The lens can be made either converging or diverging by adjusting the focal length.
Mirror - adds a mirror to the optics bench. The focal point can be adjusted by dragging the hotspots after clicking on the mirror. The mirror can be made either convex or concave by adjusting the focal length.
Aperture - adds a partial blockage of light rays. The width of the opening can be adjusted by dragging the hotspots after clicking on the aperture.
Physlet by Wolfgang Christian and Melissa Dancy