Light Energy Gabriella Bicknell Mrs.Branin Grade 5 What is Light? - - PowerPoint PPT Presentation

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Light Energy Gabriella Bicknell Mrs.Branin Grade 5 What is Light? - - PowerPoint PPT Presentation

Light Energy Gabriella Bicknell Mrs.Branin Grade 5 What is Light? Light is like sound. We can't observe a piece of light. Both light and sound are means of transferring energy between points. Scientists believe light travels in


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Light Energy

Gabriella Bicknell Mrs.Branin Grade 5

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SLIDE 2

What is Light?

  • Light is like sound. We can't
  • bserve a piece of light. Both

light and sound are means of transferring energy between points.

  • Scientists believe light travels

in straight lines. However this is only true when light stays in the same path with the same substance all the way.

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Concave Mirror

A concave mirror is a mirror that curves in on the shiny side. The image it produces is enlarged right side up images ,

  • r an upside down Image.

The farther you get from a concave mirror the smaller you

  • get. You will still remain upside

down.

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SLIDE 4

Convex Mirror

  • A convex mirror is a mirror that

curves out on the shiny side. The image it produces is upright, life sized, and reversed

  • Convex mirrors are used in

cars and as security systems in stores.

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Polarization

  • Polarization is the process of allowing light

vibrations to pass through in only one direction

  • Polarized sunglasses use polarizing material to

help you see better on a sunny day.

  • The sunglasses block glare and all kinds of light

that can vibrate sideways.

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Translucent

  • Translucent objects let only

some light through so objects

  • n the other side appear

blurry

  • They are used in shower

doors because they allow light in but with privacy

  • The light may bounce in all

directions

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SLIDE 7

Opaque

  • Opaque objects completely

block light from passing through.

  • Objects like teddy bears ,

books, computers, or I pads.

  • Many people think empty

space is opaque to light, but the starry nigh shows light can travel through empty space.

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SLIDE 8

Transparent

  • Transparent objects allow light

to pass through with almost no disturbance.

  • These objects may not color

the light but you can see

  • bjects clearly.
  • Fish bowl is an example of an

transparent object.

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What happens when light passes through matter?

  • Sometimes when light passes through matter

almost all the light gets through.

  • Sometimes only some light gets through
  • In other cases no light gets through
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What is a prism ?

  • A prism is a cut piece of clear

glass , with two opposite sides in the shape of a triangle or other geometric shape.

  • Prisms effect light because they

make rainbows. The rainbow colors you see after a storm acts both as prisms and mirrors.

  • The rain drops bend rays of

sunlight at different angles, which causes the colors to spread out. The various colors reflect off the the back of the drops into your eye.

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SLIDE 11

Electromagnetic Spectrum

An electromagnetic spectrum shows all the wavelengths of visible and invisible light in order, from short to long. Instruments such as spectroscopes detect light we can't see.