1. Interactions of Light
Write on RIGHT Side

2. Non- Transparent Brick Wall
Transparent Glass
Matter that transmits light.
Objects can be seen clearly through it
Ex: Air, water, some types of glass
Non- Transparent Brick Wall

3. Translucent Frosted glass causes the image to look fuzzy
Materials transmit light, but do not let the light travel straight through
Objects look distorted or fuzzy
Ex: frosted glass, lamp shades

4. Opaque Materials do not let any light pass through them
Reflect light, absorb it, or both
Ex: wood, brick, metal
The shirt is opaque, because light does not pass through it, so we cannot see behind it

5. Absorption
When light enters a material but does not leave it
The transfer of light energy to matter
The shirt absorbs the light that falls on it, therefore the shirt is opaque

6. Reflection When light bounces off the surface of an object
When light strikes a smooth surface such as a mirror, it reflects in a uniform way
When light bounces off the surface of an object

7. Reflection & Absorption
The frog’s body is green because it reflects green and absorbs the other colors

8. Light Transmission
For example, a green soda bottle is not green because it reflects green light, but instead transmits green light (lets it pass through) and absorbs other colors
The color of a transparent or translucent object works differently than it does for opaque objects
Some materials absorb some colors but let other color pass through

9. Light through a Medium
When light passes through an object, it slows down
Denser medium = slower light
Different wavelengths slow down more than others
Ex: In a medium, the speed of violet light is less than the speed of red light

10. Refraction
The change in direction of a wave as it passes from one medium into another at an angle
Causes a straight object to appear bent when it’s underwater

11. Light and the Earth’s Atmosphere
Light waves travel at 300,000,000 m/s through space
When light reaches the Earth, it slows down and refracts due to the gases in the atmosphere

12. Scattering
When light is sent in many directions as it passes through a medium
The color of the sky is due to scattered light, because the sky scatters light with short wavelengths (blue & violet)

13. Reflection (Left Side)
In text book, on page 313 cut out “Key Concepts” (#6, 7, & 8)
Answer the questions
Glue/ Staple on the left side next to notes