Welcome to The World of LIGHT! Luckily, you've just found a good place to spend your leisure time.

    At first, I believe many of you knew this interesting thing, LIGHT, in your school life, more or less. And, you may heard some famous people in this scientific field. For example, Thomas Alva Edison, a famous inventor, who invented electric lights; Albert Einstein, an outstanding physicist in 20th century, who brought up Theory of Relativity. Besides, everyone knows this formula, E=mc². E means energy, m means mass, and c means velocity of light.

    In daily life, you must have seen some kinds of lights around you, like lamps, neon lights on streets, laser, stars, etc. So, light is an important role, not only in humans'  world, but also in animals' and plants'. Every creatures need it, and it brings us modern civilization. If you think the light is unnecessary in your life, just experience a stormy night without electric light, flashlight, or candle. Then, I think you'll change your thought at once... :-)

    This website has some topics about light -- scientific, artistic, and practical. But, we do our best to let it easy to read. Less math formula ( A lot of students are afraid of them. ); more common sense. Making all people interested in reading scientific subject is our main purpose. Science used to be a boring and troubling subject for many people, students especially. We are now students, too. So, we know what kind of science is interesting and what is boring. As you glancing at our website, you'll find that it's different from textbooks for students in school, not just one is colorful and the other is only black and white. Here we have many illustrations and photos. We think a picture is more persuasive than a paragraph.

    Perhaps some learned friends think our works are too easy for them, but we hope you'll find some surprises -- interesting things you don't know. Now, have a nice trip at our site, and please remember to leave words for us. We sincerely thank for your suggestions, and you can help us do better next time.

1. The Light around Us
    Well, here you can see many beautiful pictures or photographs. There are Milky way in the evening sky, colorful rainbow, sparkling fireworks, shining creatures, some artistic paintings. Because of the magical light, we can SEE the world clearly. We hope you keep your eyes wide open, and enjoy the beauty that light gives us.

2. What is LIGHT?
    Light is mysterious. It may come from sun, moon, stars, fire, or electric lights, and it moves very fast. It is a kind of energy, just as electricity or heat. In fact, the light is a kind of electromagnetic wave, and it's the only one we human can see by eyes.

3. Color Theory -Chromatics
    Color, the essential of art, not only colors the papers and canvas, but colors our environment and living styles. Although the primary colors are only three kinds, by means of mixing, there come a lot of new colors. Do you know the mix of lights is different from the mix of dyes? They opposite to each other. Come here to search or make the colors you like!

4. Electromagnetic Wave
    The LIGHT has many relatives, and they are a family named electromagnetic wave. You must have heard the X-ray. In hospitals, doctors often use it to examine the bones in human bodies. A scientist uses it to do chemical analysis in laboratory. Other members of electromagnetic wave like ultraviolet, gamma ray, or radio wave. You'll understand who they are, and what they can do for us.

5. Geometrical Optics
    If you stand near a pond, you'll easily underestimate the depth of it. It's not your eye's fault; the light cheats you ( refraction of light ). A mirror is a useful tool. It let you see yourself, and your dressing, shaving become easier ( reflection of light ). A magnify glass make the things you see become bigger ( another refraction of light ). If you use the reflection and refraction well, they can save you a lot of trouble.

6. Light in Our Daily Lives
    In this topic we'll illustrate the electric light bulb and the fluorescent lamps. After sunset, in the evening, these artificial lights works after the sun. Thanks for Edison, so nowadays we don't use fire, kerosene lamps, or candles as light sources. By the way! Don't forget to economize the energy; please turn off the light after you use.