The document discusses different types of light interactions with matter, including reflection, refraction, diffraction, interference, absorption, transmission, reflection, and how these interactions result in color. It explains the law of reflection, types of reflection, refraction, diffraction, interference, the three types of matter based on how light passes through (transparent, translucent, opaque), primary colors of light and pigments, color addition and subtraction, and includes links to interactive color mixers.

1. Light Interactions
WWMS
7th Grade Science

2. Law of Reflection
• The angle of incident
equals the angle of
reflection

3. Regular Reflection
• When light is reflected
of off a smooth
surface.
• Your eyes will see a
reflection on the
surface.

4. Diffused Reflection
• The reflection of light
from an uneven
surface.
• Your eyes will not see
a reflection on the
surface

5. Refraction
• The bending of light
as it goes through a
different medium and
changes speeds.

6. Diffraction
• The bending of light
around barriers
• The colors on the
spider web are due to
the diffraction of light.

7. Light Interference
• The iridescence of the
Peacock’s feathers is
caused by light
interference from
many layers of
reflected light.

8. 3-Types of light interactions with
matter
•
As light passes
through this window
it can be:
1. Absorbed- soaked up
2. Transmitted- pass
through
3. Reflected- bounce off

10. 3 Types of Matter
1. Transparent- light is
transmitted in strait
lines
2. Translucent- light is
transmitted in
scattered patterns
3. Opaque- all the light
is absorbed.

11. Color Addition
•
The 3 primary colors
of light are:
1. Red
2. Green
3. Blue
When combined they
form white.

12. Color Subtraction
•
The primary pigment
colors are:
1. Magenta
2. Cyan
3. Yellow
•
•
They can combine to
produce any other
color.
When mixed they
create black

13. Interactive Color Mixers
• Link to color addition
• Link to color
subtraction