Light
light energy is one perceived by sight. Light help us see things you
the light source, the light source means what caused the light by isolated 3 types
1.Light resulting from the nature, such as the sun, some stars, lightning, light from the sun is considered to be the light source, the largest
2. Light from the animals. Some animals have light in itself, such as the firefly
3.Light man-made, such as candle light bulb light resulting from burns
the light travels from lots of light source with very fast. By traveling, 186 000 miles per second, or 300000 kilometers per second. The light will travel in a straight line, and travel through a vacuum, such as the light from the sun to come to our world through a vacuum. Through the air to the world of our time 8 minutes.93 million miles
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intermediates intermediates of light of light refers to objects that stand in the way of light is divided into 3 types
1 medium transparent means. A medium that allows light through such as Sai plastic and glass. The air clear glass
2.Translucent medium means medium light goes well, but not all through, such as muddy waters, mirror ceiling or haze, etc.
3 medium recording light. Mean, medium to light through anything, such as zinc, tile, glass, etc.
.Refraction
.Light traveling through the medium alone will travel in a straight line, but when light travels through a medium one. To another medium with different densities, there will be a refraction of light, such as light traveling from the water through the air.Be born refraction straight seam.
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