Area of Circle

Area of Circle

How to calculate the area of a circle If you cut the circles and stick them together, they gradually become more rectangular. In this rectangle, the width is half of the circumference, and the height is the radius. Therefore, The … more

금성의 위상

Phase of Venus

Venus’ changes in phase and size are strong evidence of ‘Heliocentrism.’ Venus looks like a crescent moon or a full moon, depending on its angle to the sun. Venus is large when it looks like a crescent moon. And Venus … more

Resonance

Resonance

Resonance Resonance is a phenomenon in which the amplitude increases at a specific frequency. The resonance phenomenon can be easily observed around us. 1. Swing When you push the swing, if you push it well according to the swinging cycle, … more

Superposition Simulation

Superposition

Superposition and interference of waves Two matters cannot be in the same location. But, two or more waves can be in the same space and at the same time. Throwing two stones into the pond creates an interference pattern due … more

Quantum of Light

Quantum of Light

This simulation assumed that a candle emits all its energy in only one specific wavelength. The power of the candle is assumed to be 50W. The emitted wave diagram is for understanding only and does not represent the actual wavelength … more

Diode making

Diode making

A diode is an electronic component that conducts current primarily in one direction. It has low resistance in one direction, and high resistance in the other. A diode is made by joining an n-type and p-type semiconductor. n-type semiconductor: doping … more

Thermometer

Thermometer

A thermometer is a device used to measure temperature. There are several types of thermometers, depending on how the temperature is measured. Thermal Expansion: Uses the principle that the volume expands with increasing temperature. Mercury thermometer, alcohol thermometer, bimetal thermometer. … more