Law of Reflection
The law of reflection Consider a light-ray incident on a plane mirror, the angle of reflection is equal to the angle of incidence. This is the law of reflection. When looking at…
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Science simulation
Maximum Elongation of Inner Planets
Maximum Elongation of Inner Planets From the Earth’s perspective, the inner planets seem to stay near the sun. This is because it orbits the inside of the earth.So the inner planets can…
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Fourier Analysis
Fourier series A Fourier series is a way to represent a function as the sum of simple sine waves. A simple trigonometric function consists of a smooth surface. If you continue to…
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Formation Model of Columnar Joint
Formation of Columnar Joint A columnar joint appears as a polyhedral pillar, such as a tetragonal, pentagonal, or hexagonal shape. Its shape depends on the rate at which the lava solidifies. Columnar…
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Distance of 1 pc(parsec)
Parallax When an object is close to me, you can use a ruler to measure the distance. But, it is difficult to measure when the object is away from me. In this…
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differentials
differentials The derivative method is a method of obtaining the amount of change at a point of a graph f(x). This is similar to the process of finding the tangent slope at…
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Covalent Bond
What is Covalent Bond? Covalent bond is a bond formed by atoms, each of atom creates an electron pair and shares it. Because each other’s electrons are shared in pairs, the number…
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Correction of Near-sightedness & Far-sightedness
Focusing To see things detaily, the light from one point of the object must be gathered exactly at one point on the retina. On the other hand, if the light from one…
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Stellar Parallax
Parallax When an object is close to me, you can use a ruler to measure the distance. But, it is difficult to measure when the object is away from me. In this…
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Horizontal Coordinate System
Celestial coordinate system A celestial sphere is an abstract sphere centered on an observer. All objects in the sky can be conceived as being projected upon the inner surface of the celestial…
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