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Light unit terms
| Question | Answer |
|---|---|
| Radiation | the emission of energy through EM waves |
| Particle | wave theory of light |
| Electromagnetic Spectrum | the entire range of EM waves |
| Radio Waves | cover a wide variety of waves in the EM spectrum |
| AM Radio | have longer wavelengths |
| FM Radio | have shorter wavelengths |
| Ionosphere | the layer of earth’s atmosphere where radio waves bounce off |
| Microwaves | shorter wavelengths and higher frequency than radio waves |
| Radar | the use of microwaves to tell the distance and speed of an object |
| Infrared Waves | waves sent by the sun that is absorbed by your skin |
| Visible Light | the very narrow range of wavelengths that the human can see |
| Ultraviolet Light | waves produced by the sun that have shorter wavelengths and higher frequencies than visible light |
| X | Rays |
| Gamma Rays | large amounts of energy that can go through objects easily |
| Law of Reflection | states that the angle of incidence is equal to the angle of reflection |
| Regular Reflection | light beams off all points of a surface at the same angle |
| Diffuse reflection | occurs when light beams at many different angles |
| Absorption | the transfer of energy carried by light waves to particles of matter |
| Scattering | the release of light through particles of matter that have absorbed energy |
| Transmission | the passing of light through matter |
| Transparent | matter through witch visible light is easily transmitted |
| Opaque | matter that does not translate any light |
| Translucent | matter transmits light but also scatters the light as it passes through the matter |
| Primary Colors of Light | Red, blue, and green |
| Pigment | a material that gives a substance its color by absorbing some colors of light and reflecting others |
| Primary Pigments | yellow, cyan, and magenta |
| Prism | a piece of glass that separates white light into colors of visible light by refraction |
| Plane Mirror | mirrors that are flat |
| Concave Mirror | mirrors that are curved inward |
| Convex Mirror | mirrors that are curved outward |
| Virtual Image | : an image (as seen in a plane mirror) formed of virtual foci |
| Real Image | an optical image formed of real foci |
| Concave Lens | thinner in the middle than around the edges |
| Convex Lens | thicker in the middle than the edges |
| Retina | the back surface of the eye |
| Nearsightedness | when the eye is too long and it focuses light in front of the retina |
| Farsightedness | when the eye is too short and focuses light farther away from the retina |
| Colorblindness | not being able to see colors |
| Rods | one of the rod |
| Cones | One of the cone |
| Laser | a device that produces intense light of one color |
| Hologram | a piece of film on which an interference pattern produces a three dimensional version of an object |
| Maiman | created the first laser |
| Dennis Gaber | invented hologram |
| Luminous | objects that produce visible light |
| Illuminated | a visible object that does not give off light |
Created by:
Nick Curtis
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