Små Spil for Børn og Barnlige Sjæle
Gæt en hunde Race - bogstav leg.
Klik for at få løsning/ny opgave
Glide pusle spil - Klik en brik
Puslespil - image magnets
Tal Spring
- Klik på et felt der har en afstand til det blå felt,
som svarer til tallet i det blå felt. Du kan ikke gå på skrå.
Connect 4
Lissajous Lab
Dette er ikke et spil, men et Virtuelt oscilloscope og flot lavet.
Sådan virker det : Vælg Preset knapper til venstre for at se forudindstillede mønstre. Du kan også lave dit eget mønster ved at forøge eller formindske værdierne i højre side. Forøg et tal ved at klikke øverst på tallet - formindsk et tal ved at klikke nederst på tallet.
Lissajous Figures
Lissajous (pronounced LEE-suh-zhoo) figures were discovered by the French physicist Jules Antoine Lissajous. He would use sounds of different frequencies to vibrate a mirror. A beam of light reflected from the mirror would trace patterns which depended on the frequencies of the sounds. Lissajous' setup was similar to the apparatus which is used today to project laser light shows.
Before the days of digital frequency meters and phase-locked loops, Lissajous figures were used to determine the frequencies of sounds or radio signals. A signal of known frequency was applied to the horizontal axis of an oscilloscope, and the signal to be measured was applied to the vertical axis. The resulting pattern was a function of the ratio of the two frequencies.
Lissajous figures often appeared as props in science fiction movies made during the 1950's. One of the best examples can be found in the opening sequence of The Outer Limits TV series. ("Do not attempt to adjust your picture--we are controlling the transmission.") The pattern of criss-cross lines is actually a Lissajous figure.
The Lissajous Lab provides you with a virtual oscilloscope which you can use to generate these patterns. (You will control the horizontal. You will control the vertical.) The applet also allows you to apply a signal to modulate the hue of the trace, so you can create colorful designs.
| Explanation of Readout Values |
| xFreq |
This is the number of horizontal cycles for each frame of the plot. |
| yFreq |
This is the number of vertical cycles for each frame of the plot. |
| hueFreq |
This is the number of hue cycles for each frame of the plot. Each hue cycle represents a complete spectrum of colors. |
| Samples |
This is the number of line segments which will be used to draw each frame of the plot. Increasing this number will make the curves appear smoother. Decreasing this number will exacerbate the aliasing in the plot (making it look more like string art than a mathematical curve). |
Lissajous med tilladelse fra: Ed Hobbs © Copyrights
Glidepuslespil, gæt en hund , talspring og imagemagnets - spil med tilladelse © Eric Harchbarger
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