Kim LachlerUpdated 2015

NCES :6.P.1.1 & 6.P.3.2

AbsorptionAbsorption The transfer of light The transfer of light

energy to particles of energy to particles of mattermatter

As a beam of light travels As a beam of light travels through the air, particles through the air, particles in the air absorb some of in the air absorb some of the energy. the energy.

The further away it is from The further away it is from the source the dimmer it the source the dimmer it is.is.

ScatteringScattering An interaction of light with matter. This An interaction of light with matter. This

cause the light to change it’s energy, cause the light to change it’s energy, direction, or bothdirection, or both

The sky is blue because of scattering .The sky is blue because of scattering .

Blue has a short wavelength making it scatters Blue has a short wavelength making it scatters more, thus you see blue lightmore, thus you see blue light

Interacting with MatterInteracting with Matter Transparent_and_Opaque_Materials.

mov TransparentTransparent

Matter that allows most of the light to Matter that allows most of the light to pass through.pass through.

WindowWindow

Interacting with MatterInteracting with Matter

TranslucentTranslucent

Matter that allows some of the light to Matter that allows some of the light to pass through.pass through.

Wax paperWax paper

Interacting with MatterInteracting with Matter

OpaqueOpaque

Allows no light to pass throughAllows no light to pass through

WallWall

Visible Light WavesVisible Light Waves Light_and_Color.mov White light is made up of all visible White light is made up of all visible

colors.colors.

Each color has its own wave lengthEach color has its own wave length

Visible Light WavesVisible Light Waves When white light passes When white light passes

through a different medium through a different medium it is refracted and bends it is refracted and bends slightly.slightly.

Each wave length refracts Each wave length refracts and bends slightly and bends slightly different.different.

This results in white light This results in white light being separated into colorsbeing separated into colors

Visible Light WavesVisible Light Waves

ColorsColors RedRed orangeorange yellow yellow greengreen blueblue indigoindigo VioletViolet

rainbow – water droplets act as rainbow – water droplets act as a prisma prism

R

O

Y

G

B

I

V

ColorColor

When light strikes When light strikes an object it can an object it can pass through it, be pass through it, be absorbed, or absorbed, or reflected.reflected.

What wave lengths What wave lengths that are reflected that are reflected determine what determine what color you see.color you see.

ColorColor White – all visible wave lengths White – all visible wave lengths

are reflectedare reflected

Black – all visible wave lengths Black – all visible wave lengths are absorbed - absence of are absorbed - absence of color.color.

Other colors – only some of the Other colors – only some of the visible wave lengths are visible wave lengths are reflected.reflected.

ColorColor

Primary light colors- three colors that Primary light colors- three colors that can be mixed to produce light of any can be mixed to produce light of any other color.other color.

RedRed

GreenGreen

BlueBlue

BrightnessBrightness

Amplitude tells how much energy is in Amplitude tells how much energy is in the light.the light.

The bigger the amplitude the brighter The bigger the amplitude the brighter the light.the light.

BibliographyBibliography Holt, Rinehart, Winston, North Carolina Holt Science & Technology, Holt, Rinehart, Winston, Holt, Rinehart, Winston, North Carolina Holt Science & Technology, Holt, Rinehart, Winston,

Orlando, 2005Orlando, 2005 NASA, The Electromagnetic Spectrum, http://science.hq.nasa.gov/kids/imagers/ems/index.html, NASA, The Electromagnetic Spectrum, http://science.hq.nasa.gov/kids/imagers/ems/index.html,

accessed 1/26/11accessed 1/26/11 Google images, googleimages.com, access 1/31/11Google images, googleimages.com, access 1/31/11