RGB Media Art
When the red (R), green (G), and blue (B) circles are made very small and placed close together, they eventually become too small for the human eye to distinguish individually. Instead, the eye combines and averages … more
Heart Rate Counter
Pulse Blood vessels are elastic. When the heart contracts, the blood vessels dilate; when the heart relaxes, the vessels constrict. Hemoglobin in the blood absorbs particular light. Therefore, when light is applied to human tissue, the … more
Life Game (algorithm, not a game)
Life game It was in 1970 that Martin Gardner introduced J.H. Conway’s “Life game” in Scientific American, an American science magazine. The “Life game” is not a conventional game that requires continuous input from a player. … more
Satellite Circular Orbit Game (Scoreboard Edition)
This is the start page for the game where you drag a satellite to create an orbit as close to a perfect circle as possible. When the teacher creates a game, a QR code for joining … more
Repeating Measurement Alarm Clock
You can set an alarm to sound at specified minute intervals. It is useful for taking measurements at regular time intervals in a science laboratory. You can easily determine the corresponding time for each measurement count.
Element Symbol Typing Bubble Game (Scoreboard Edition)
This page is the start screen for the Element Symbol Typing Bubble Game. When a teacher creates a game, a QR code for joining and a live scoreboard will be displayed on the screen. Students can … more
How Colored Shadows Work
How Colored Shadows Work This simulation demonstrates both the principle of additive color mixing and how colored shadows are formed. To understand colored shadows, there are a few important concepts to know. Each flashlight emits only … more
Convex Mirror & Concave Mirror
Real image and virtual image Looking at an object, we feel there is an object in it. By the way, if you feel that there is something, we say there is an ‘image’, even if there … more
Convex Lens & Concave Lens
Real image and virtual image Looking at an object, we feel there is an object in it. By the way, if you feel that there is something, we say there is an ‘image,’ even if there … more
Movement of Ion particles
* You can move ion particles with the mouse. Movement of Ion particles Ions acquire electric charge by gaining or losing valence electrons, depending on the type of atom. Electric forces act between charged substances. A … more
Try assembling an atom
Freely combine protons, neutrons, and electrons to create your own atom. Notes This simulation only provides tools for building atomic models and does not determine whether the completed atomic model is stable. For every number of … more