Author Archive: DongJoon

Multiple Reflections

What is Image? Our eyes are designed to sense where the light started. Even if the light did not actually start there, our eyes say there is an ‘image’. There are a lot of ‘images’ when you look at the…
Read more

파동의 전파 Wave Propagation

Wave Propagation

In science, a wave is a phenomenon in which energy is transmitted through the medium. Only energy is transmitted through the waves. The medium that participates in the vibration only vibrates and does not actually move. Not all waves require…
Read more

하이포사이클로이드 Hypocycloid

Hypocycloid

A hypocycloid is a special plane curve generated by the trace of a fixed point on a small circle that rolls within a larger circle. If the radius of a large circle is R, and the radius of a small…
Read more

에피사이클로이드 Epicycloid

Epicycloid

Epicycloid refers to the trajectory drawn by a vertex on a small circle when a small circle is rolled outside a large circle. The radius of a large circle is denoted by R, the radius of a small circle is…
Read more

사운드 분석 - 진동수와 음량

Sound Analysis

What is the main frequency of the sound around us? This simulation works on Microsoft Edge , not Internet Explorer, FireFox, Chrome, Safari, Opera. Please allow to request access to the microphone.