| A | B |
|---|
| light | range of EM frequencies that stimulate the retina of the eye. |
| violet light | shortest wavelenth, highest frequency light wave |
| red light | longest wavelength, lowest frequency light wave |
| radio waves | longest wavelength, lowest frequency EM wave |
| gamma rays | shortest wavelength, highest frequency EM wave; used to destroy cancerous tumors in radiation therapy |
| infrared waves | emitted by "hot" objects; produces the sensation of heat |
| microwaves | a type of radio wave used for communication and cooking |
| ultraviolet (UV) waves | cause sunburn; used to disinfect objects because it can kill bacteria |
| X-rays | penetrates soft tissue; used to visualize bones in your body |
| luminous body | emits light waves |
| illuminated body | reflects light waves |
| candela | SI unit for luminous intensity |
| lumen | unit of luminous flux (P) |
| lux | lumen per square meter - unit of illuminance (E) |
| spectrum | ordered arrangement of EM wavelengths |
| transparent | transmit light waves - you can see through it! |
| transluscent | partially transmit light - you can see trrough it, but in a distorted or blurry sort of way |
| opaque | does not allow light to pass through it |
| primary colors/secondary pigments | red, green, blue |
| secondary colors/primary pigments | cyan, magenta, yellow |
| black | the absence of all light |
| white | the combination of all light |
| dye | molecule that absorbs some wavelengths of light and reflects other wavelengths of light |
| pigment | a colored material that absorbs certain colors and transmits or reflects other colors |
| polarized light | light that has its wavelengths ordered in a particular plane of vibration |
