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Light waves interact with materials

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									Light waves interact with materials


Light can be reflected,
transmitted, or absorbed



             Created by KBuckner for Fried or
                     Slide PBL 2010
TRANSMISSION

  Transmission is the passage of an EM
   wave through a medium
  If light reflected by objects did not pass
   through air, windows, or most of the
   eye, we would not be able to see
   objects


               Created by KBuckner for Fried or
                       Slide PBL 2010
Absorption

  Absorption is the disappearance of an
   EM wave into the medium
  Absorption affects the way things look




              Created by KBuckner for Fried or
                      Slide PBL 2010
Watch this clip to learn about
transparent, translucent, and opaque
objects.




             Created by KBuckner for Fried or
                     Slide PBL 2010
How materials transmit light
  Transparent
   materials allow most
   of the light that
   strikes them to pass
   through
  It is possible to see
   objects through a
   transparent material
  Air, water, clear
   glass
                 Created by KBuckner for Fried or
                         Slide PBL 2010
CAN YOU NAME SOME
TRANSPARENT OBJECTS?




         Created by KBuckner for Fried or
                 Slide PBL 2010
Translucent


 Translucent materials
  transmit some light but
  cause it to spread in all
  directions
 You can see light
  through these materials
  but no clearly
 Lampshades, frosted
  glass, sheer fabrics,
  notebook paper

                   Created by KBuckner for Fried or
                           Slide PBL 2010
CAN YOU NAME SOME
TRANSLUCENT OBJECTS?




         Created by KBuckner for Fried or
                 Slide PBL 2010
OPAQUE

  Opaque materials
   do not allow any
   light to pass through
   them
  Heavy fabrics,
   construction paper,
   ceramic mugs



                 Created by KBuckner for Fried or
                         Slide PBL 2010
CAN YOU NAME SOME OPAQUE
OBJECTS?




         Created by KBuckner for Fried or
                 Slide PBL 2010
LET’S REVIEW
  TRANSPARENT



  TRANSLUCENT



  OPAQUE
            Created by KBuckner for Fried or
                    Slide PBL 2010
Let’s Play a Game!!
Rules: If the ball is tossed to you,
answer the question that appears on
the slide.
*If you get the question right, toss the
ball to a friend.
*If you get the question wrong, toss
the ball to your teacher.
GOOD LUCK!     Created by KBuckner for Fried or
                       Slide PBL 2010
This flask is ….


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
This lamp shade is…


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
This vase is ….


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
Aluminum Foil is…


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
This greenhouse is ….


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
This wall is ….


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
This rock is….


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
A magnifying glass is …..


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
Tissues are…


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010
Notebook Paper is…


  Transparent


  Translucent


  Opaque


                 Created by KBuckner for Fried or
                         Slide PBL 2010

								
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