| A | B |
|---|
| Electromagnetic Waves | Disturb electric and magnetic fields |
| Electromagnetic Waves | Can travel in a vacuum and do not require a medium |
| Frequency | Increases as you move across the electromagnetic spectrum |
| Wavelength | Decreases as you move across the electromagnetic spectrum |
| Radio waves | Type of waves used primarily for communication and have the longest wavelength and lowest frequency |
| Visible Light | Waves which allow us to see |
| Red | Color in visible spectrum which has the longest wavelength |
| Violet | Color in visible spectrum which has the shortest wavelength |
| Infrared | Waves which can be felt as heat |
| UV rays | Waves which cause us to tan in the summer and can give us skin cancer |
| X rays | Waves used to see if a bone is broken |
| Gamma Rays | Waves with the highest frequencies and shortest wavelengths |
| 300 million meters/second | Speed of light and electromagnetic waves |
| Ray Model of Light | Light rays travel in straight lines |
| Shadow | Forms when opaque objects get in front of a beam of light |
| Reflected, Absorbed, or Transmitted | Three things that can happen to light when it strikes a surface |
| Reflection | Bouncing back of light |
| Law of Reflection | Angle of incidence equals the angle of reflection |
| Regular reflection | Produced when light rays bounce off a smooth surface |
| Diffuse reflection | Produced when light rays bounce off a rough or irregular surface |
| Mirror | Smooth reflecting surface made of glass coated with silver |
| Plane, Concave, and Convex | Three types of mirrors |
| Plane | Flat mirror which produces an image which is right side up and about the same size as the object. |
| Concave | Type of mirror which curves inward |
| Concave | Mirror used in headlights, flashlights, and search lights |
| Concave | Light rays are reflected into a point in front of the mirror called the focal point |
| Convex | Type of mirror which curves outward |
| Convex | Mirror used in rearview and sideview mirrors and for security in stores |
| Refraction | Bending of light waves |
| Why does refraction occur? | Light waves are traveling between two different mediums of two different densities |
| Colors of the visible spectrum | Visible when white light or visible light is refracted |
| Transparent | Type of material which transmits light and produces a clear, detailed image |
| Translucent | Type of substance which transmits light, but DOES NOT provide a clear detailed image |
| Opaque | Type of substance which DOES NOT transmit light |
| Colors which are reflected | Colors "we see" off opaque objects |
| Colors which are absorbed | Colors "we DO NOT see" off opaque objects |
| White Light | Reflects all the colors of visible light/and reflects heat |
| Black | Absorbs all the colors of visible light/and absorbs heat |
| Rainbow | Produced when white light is refracted through water or glass |
