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  1. 1. Light By Denise Carroll
  2. 2. Light THINK: Why is light important?
  3. 3. Light • We see things every day, from the moment we get up in the morning until we go to sleep at night. • We look at everything around us using light. • Without light, you wouldn't see anything at all. • There are two types of light: natural light or artificial light.
  4. 4. Natural Light • The most important source of natural light is the sun. • The sun gives the earth light and energy. • The moon and stars receive light from the sun and reflects it to the earth. • A firefly also produces light.
  5. 5. Artificial Light • Artificial light is light that is made by people, or man-made. • This includes candles, kerosene lamps, flashlights, and light bulbs.
  6. 6. Light • Light is a kind of energy that travels in waves. • Light can pass through some things, but not others. • Light travels very fast and in straight lines.
  7. 7. Transparent • An object that lets all light pass through it is called transparent. • These objects are transparent: clear glass, eyeglasses, window, fish tank, clear plastics, and transparent tape.
  8. 8. Translucent • An object that lets some light pass through it is called translucent. • These objects are translucent: waxed paper, sunglasses, frosted glass, and thin fabrics.
  9. 9. Opaque • An object that lets no light pass through it is called opaque. • These objects are opaque: rock, metal, wood, fog, aluminum foil, thick paper, and brick.
  10. 10. Shadows • Shadows are caused by opaque objects blocking the path of light. • Long shadows are seen in early morning and late afternoon. • Shorter shadows are seen at noon.
  11. 11. Reflections • Reflect is when light or an image bounces back off an object’s surface. • Light can bounce back off an opaque object. • An image can bounce back off an object, such as, a mirror, pond or lake, or shiny metal.
  12. 12. More Reflections
  13. 13. Lightning • Light travels faster than sound. • That is why the lightning is seen before the thunder is heard.
  14. 14. Rainbow • A rainbow appears in the sky when the sun shines through droplets of water in the air, creating a spectrum of color. • The white light is broken up into many colors.
  15. 15. Spectrum of Color • When you look at a light, it appears to be white. • Light is made up of many colors. These colors can be seen when light is broken up. • There are seven colors of light in a spectrum: red, orange, yellow, green, blue, purple, and violet. • These colors are always seen in the same order.
  16. 16. Congratulations! • You have learned that light is a form of energy, light is made up of many colors, and how light travels, Let There Be Lots of Light!
  17. 17. Resources • http://images.search.yahoo.com • http://office.microsoft.com/clipart