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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
OPAQUECreated 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
