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LIGHT

LIGHT. What is Light?. Light, just like sound, is a form of energy that travels in waves. However, unlike sound, light can travel through empty space. Reflection. When the light bounces off a surface, it’s known as a reflection . . Reflecting Light.

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LIGHT

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  1. LIGHT

  2. What is Light? • Light, just like sound, is a form of energy that travels in waves. However, unlike sound, light can travel through empty space

  3. Reflection • When the light bounces off a surface, it’s known as a reflection.

  4. Reflecting Light • Light that reflects off of a smooth surface reflects a pattern that we can predict • The new direction is related to the old direction. It comes down on one angle and reflects of in one direction on an angle.

  5. Refraction • As light passes through the air, into the tank, and back out, two things are happening: • The light’s speed is changing • The light is bending • When light bends as it moves from one material to another, refraction occurs. Refractedlight can make a solid object seem like it’s in two parts. When a beam of light enters water, it slows down. If it hits the surface at an angle, the light bends. A beam of light doesn’t bend if it enters water straight on.

  6. Affecting Light There are certain materials that will affect the amount of light that passes. Three of them are: • translucent material • transparent materials • opaque materials

  7. Translucent • Translucent materials allow some light to pass through, you can’t see through translucent materials clearly.

  8. Transparent • Transparent materials allow most of the light that hits it to pass through.

  9. Opaque • Opaque materials are those materials that don’t allow any light to pass through.

  10. Essential Question • EQ: How do objects bend light?

  11. Light in a Rainbow • Rainbows occur when sunlight passes through a rain drop, which is shaped like a tiny prism. As the solid sunlight also known as white light, passes through the drops, the light waves refract, or bend, as they enter and leave the drop

  12. Rainbows • As white light enters and then goes through a prism, the bent light causes the colors to separate and travel in slightly different paths.

  13. Lenses • A lens is a curved transparent object that reflects light. There are many different types. • Convex Lens • Concave Lens

  14. Convex Lens • A convex lens is a lens that is thicker in the middle than at the edge. • When light travels through convex lenses, the light bends toward the thickest part of the lens, which is the middle. • When objects are viewed through a convex lens, they make things appear larger, or sometimes upside down.

  15. Concave Lens • A concave lens is thicker at the edge than in the middle. • As light travels through aconcave lens, it travels through the thickest part, which is the end. • Objects seen through a concave lens appear smaller and are always upright

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