Three Primary Colors
* Touch the screen to move the colored circles. Three primary colors of light Red, green, and blue are called the three primary colors of light. You can create any color by adjusting the light of … more
Light & Wave Simulation
Rainbow by Raindrops
A rainbow is a natural phenomenon where the dispersion of light is most visible. As you know, We can see a rainbow after rain because the water droplets bend and disperse the light. For example, if … more
Seismic Wave
Investigation inside the Earth The surest way to see what the Earth is like is to penetrate and see it yourself. However, there is a limit to penetration because the temperature and pressure rise as you … 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
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
Refraction on water
Refraction is the bending of a wave caused by a change in its speed as it moves from one medium to another. This occurs because of the slow speed of light in dense materials. Examples of … more
Phase array
Spinning radar In general, electromagnetic waves (radio waves) propagate in all directions. In this case, radio waves can be transmitted or received in any direction. However, as the distance increases, the strength of the radio wave … more
Cochlear and Audible Frequency
The sensing part is slightly different depending on the frequency of sound. Move the slide bar to check. Cochlear Inside our ears, there is a sensory organ that senses sound. The overall shape resembles a snail … more
What color does it look?
Three primary colors of light Red, green, and blue are called the three primary colors of light. You can create any color by adjusting the light of these three colors appropriately. red + green = yellow … more
Doppler Effect
Doppler Effect We have heard an ambulance siren and felt that the ambulance is getting closer. When the ambulance approaches, the sirens sound higher, and when they move away, the sirens sound lower. That is, when … more
