Polarization
Polarizers are made of long-chained molecules which absorb light with electric fields. When you shine a light on a polarizer, only a part of the light is passed. The polarizing plate materials absorb only the electric … more
Light & Wave Simulation
RGB Decomposer (with Webcam)
The image captured on the camera is divided into three primary colors of light. Notice & Information The following web browsers are currently supported: Windows: Microsoft Edge, Google Chrome Android: Microsoft Edge, Google Chrome iOS: Safari … more
RGB Filter (with Webcam)
If three primary colors of light (red, green, blue) are illuminated in a dark place, how will it look? Notice & Information The following web browsers are currently supported: Windows: Microsoft Edge, Google Chrome Android: Microsoft … more
Waves made with springs
Waves in spring When the left end of the spring vibrates, the vibration is transmitted to the other end. A spring can vibrate horizontally or vertically. Fixed-end reflection When a wave reflects off a fixed-end, the … more
Sound Analysis (Finding the main frequency, measuring the Doppler effect)
What is the main frequency of the sound around us? Please allow the simulation to request microphone access. If you have set up the microphone or refreshed the webpage screen, touch anywhere on the screen once. … more
Waveform and timbre of sound (using mic)
This simulation shows the surrounding sounds as waveforms. Please turn off the silent mode on your mobile device to allow microphone detection. For PC, please allow permission to use the microphone. No voice data is stored … more
LCD Display 2
Color and Eye Recognition Visible light has various colors. Light has a different color depending on the wavelength (or frequency). So, how do people perceive color? Cone cells in the eye’s retina recognize color. There are … more
Spectrogram
This simulation analyzes the sound around you and displays it as a spectrum. The simulation works by recognizing the surrounding sounds. In the case of PC, please grant permission to use the microphone. Voice data is … more
Optical Experiment Simulator
It is an optical experiment simulator consisting of a slit laser, lenses, and mirrors of various shapes. You can experiment by dragging the tool you want. Slit lasers are rotatable. Try dragging the red icon behind … more
Principle of Speed Gun
Doppler effect Electromagnetic waves (or sound waves) come into contact with another object while traveling; part of the wave is absorbed or reflected. A moving ball likewise absorbs or reflects some of the incoming waves. If … more
Adjusting Camera Exposure and Focus
Camera In optics, an image is recreated by collecting some of the light emitted by an object. Devices that recognize images include eyes and cameras. The light entering the camera passes through the aperture and lens, … more
Principle of least time (Fermat’s principle)
Why does a slightly curved path take less time than a straight path? Ants can move faster on flat stones than on rugged grass. Therefore, travel time is the shortest on slightly curved paths. This principle … more