Move the horizontal and vertical sliders
to create patterns.
|The patterns on the screen are called
Lissajous patterns, named after a French scientist of the nineteenth century.
A fast moving bright dot traces the patterns on the screen. You can control the dot's side-to-side speed (horizontal speed) by moving the horizontal slider. You can control the dot's up-and-down speed (vertical speed) by moving the vertical slider.
Electronics engineers use Lissajous patterns
to measure radio signal frequencies. They do this by analysing the type
of pattern an unknown signal makes when it is combined with a signal of