light

1. WHAT IS LIGHT?
Light is a form of energy!
Energy-the ability to make something move, happen, or change.

3. HOW LIGHT MOVES
Light travels away from the
light source.
Light travels in a straight
Line unless altered by what
it is moving through.

4. LIGHT SCATTERS
Light is released and spreads in
all directions.
Light looses energy the further
away it moves from its source.

5. When Light Strikes an Object
The light can be:
Reflected
Refracted
Absorbed
Transmitted

6. REFLECTION VIDEO
• Student Videos:
• https://www.youtube.com/watch?v=vt-SG7Pn8UU-
Laws of Reflection

7. REFLECTION
When light is reflected, it bounces back from
a surface.
Reflection allows objects to be seen that do
not produce their own light. For example, a
mirror or a pool of water, it is reflected so
that a reflection can be seen that looks very
similar to the object seen with light reflected
directly from it.

8. REFLECTION
Light bounces off surface at
same angle it hits.

9. REFRACTION VIDEO
• Student Videos:
• https://www.youtube.com/watch?v=jQDRNb-E-cY-
Refraction of Light
•

10. REFRACTION
When light is
refracted it passes
from one type of
transparent
material to another,
and changes
direction.

11. REFRACTION
• When a straw is viewed in water,
light passes from the water to the
air causing the path of the light to
bend. When the light bends, the
straw appears distorted (bent or
broken)

12. ABSORPTION
• When light is absorbed it does not
pass through or reflect from a
material. It remains in the material
as another form of energy.
• Light Absorption video

13. TRANSMISSION
• light going through an object (the type of
object is called the medium?

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

15. TRASMISSION MEDIUMS VIDEO
• Instructional Videos:
• https://www.youtube.com/watch?v=dvMYs5JXjPg -
Translucent, Transparent, Opaque

16. Transparent
• A transparent material allows light to
pass through it because it is not
absorbed or reflected.
• Objects can be seen clearly when
viewed through transparent materials.
• Air, glass, and water are examples of
materials that are transparent.

17. Translucent
• A translucent material scatters or
absorbs some of the light that strikes it
and allows some of the light to pass
through it.
• Objects appear as blurry shapes when
viewed through translucent materials.
• Waxed paper and frosted glass are
examples of materials that are
translucent.

18. Opaque
• An opaque material does not allow light
to pass through, light is either reflected
from or absorbed by an opaque
material.
• Wood, metals, and thick paper are
examples of materials that are opaque.

19. • EXAMPLES:
CLEAR=TRANSPARENT
SMOKY=TRANSLUCENT
SOLID=OPAQUE

20. TRANSMISSION:
Terms for mediums

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