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Light. By Denise Carroll. Light. THNK: Why is light important?. 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.

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Light

Light

By Denise Carroll


Light1

Light

THNK:

Why is light important?


Light2

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.


Natural light

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.


Artificial light

Artificial Light

  • Artificial light is light that is made by people, or man-made.

  • This includes candles, kerosene lamps, flashlights, and light bulbs.


Light3

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.


Transparent

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.


Translucent

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.


Opaque

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.


Shadows

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.


Reflections

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, pondor lake, or shiny metal.


More reflections

More Reflections


Lightning

Lightning

  • Light travels faster than sound.

  • That is why the lightning is seen before the thunder is heard.


Rainbow

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.


Spectrum of color

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.


Congratulations

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!


Resources

Resources

  • http://images.search.yahoo.com

  • http://office.microsoft.com/clipart


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