Water Waves

Water Waves

Water Wave When you throw a stone into a calm lake, a circle of concentric waves is created and spreads around. The phenomenon that vibration created in one place spreads to the surroundings is called a … more

LCD Display

LCD Display

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

Sound pitch and volume

Sound pitch and volume

Height and loudness of the sound When we often say that a sound is ‘low’ or ‘high,’ we are referring to the height of the sound. The height of the sound is completely different from the … more

RGB Color combination (with Webcam)

RGB Color Combination

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