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Slide 1:

LIGHT HOW IT WORKS LIGHT how it works

CSS 6c HOW LIGHT MOVES:

CSS 6c HOW LIGHT MOVES Straight Line unless altered by what moving in.

LIGHT SCATTERS AS GOES:

LIGHT SCATTERS AS GOES Light scatters and looses energy the further away from its source.

SCATTERING:

SCATTERING Light released and spreads in all directions. Why room is even with light. Sky blue: shortest wavelengths, spread more.

REFLECTION:

REFLECTION Light bounces off surface at same angle it hits.

ABSORPTION:

ABSORPTION LIGHT IS TAKEN IN BY AN OBJECT (MATTER) AND HOLDS IT. ENERGY TRANSFERRED FROM LIGHT TO HEAT. AIR PARTICLES DIMINISH LIGHT.

Slide 9:

SCIENCE LIGHTS UP MY LIFE

TRAVELS THRU MATTER:

TRAVELS THRU MATTER

CSS6f INTERACTS WITH MATTER:

CSS6f INTERACTS WITH MATTER TRANSMISSION Light goes straight unless changes what it travels through. Travels through matter: gases (air), liquids (water) and solid (glass).

TRANSMISSION: Terms for mediums:

TRANSMISSION: Terms for mediums Transparent - allows all light through. Translucent - allows some light through. Opaque - allows no light through.

Slide 13:

CLEAR=TRANSPARENT SMOKY=TRANSLUCENT SOLID=OPAQUE

When Light Strikes an Object:

When Light Strikes an Object When light strikes an object, the light can be reflected, transmitted, or absorbed.

REFRACTION:

REFRACTION The change in direction and speed. Moving from water to air, light changes angles and speed of travel.

Refraction of Light:

Refraction of Light When light rays enter a medium at an angle, the change in speed causes the rays to bend, or change direction.

CSS 6d LENSES:

CSS 6d LENSES Alter direction of light. Concave-spreads out. Convex- brings to focal point.

LENSES con’t:

LENSES con’t CONVEX -brings image to focal point. Image is larger and upside down. ie: eye, microscope, magnifying glass. CONCAVE - spreads image out. -image is smaller and upright. ie: corrective glasses.

Vision: response to the stimulus of light. :

Vision: response to the stimulus of light.

CSS6b Scattered light enters the Eye:

CSS6b Scattered light enters the Eye

ONCE ENTERS:

ONCE ENTERS LIGHT SEEN

The eye works like a camera.:

The eye works like a camera. reorder slides

REVIEW Light with Matter:

REVIEW Light with Matter TRANSMISSION - light going through REFRACTION -light bending. ABSORBTION - light absorbed. REFLECTION - light bouncing off.

LIGHT - WHAT WE SEE:

LIGHT - WHAT WE SEE LIGHT - energy by wavelengths at a level we can see. EM Spectrum - variety of wavelengths and frequency. Light is small band within.

Terms to help understand::

Terms to help understand: WAVELENGTH Anything that causes a disturbance and transmits energy through matter. (ie: ripple on pond) FREQUENCY Number of waves in set time. Decides energy level.

EM ENERGY::

EM ENERGY : Long wavelengths + Low frequency = LOW ENERGY Short wavelengths + High frequency = HIGH ENERGY

What Is the Electromagnetic Spectrum?:

What Is the Electromagnetic Spectrum? The electromagnetic spectrum is the complete range of electromagnetic waves placed in order of increasing frequency.

CSS 6A VISIBLE LIGHT (part of EM spectrum):

CSS 6A VISIBLE LIGHT (part of EM spectrum)

Light travels thru water:

Light travels thru water (why we see blue best)

TO SEE COLOR:

TO SEE COLOR Different colors represent different wavelengths. Blue- smaller wavelengths Red- larger wavelengths Color Order: ROY G BIV red, orange, yellow, green, blue, indigo, violet

CSS 6e WHITE LIGHT:

CSS 6e WHITE LIGHT Adding color makes WHITE Deleting color makes BLACK

MANY COLORS = WHITE:

MANY COLORS = WHITE

WHITE LIGHT:

WHITE LIGHT Mixture of many color/wavelengths All colors reflected. Enters the eye’s retina 3 cones:red, blue & green Rods-shades

Electromagnetic Waves:

Electromagnetic Waves Believe it or not, you are being “showered” all the time, not by rain but by waves.

COLOR -decided by what absorbed.:

COLOR -decided by what absorbed. If object absorbs then hides color. All color absorbed = black If object reflects color then see. All color reflected = white