| A | B |
|---|
| illuminated | any object can be seen because it is... |
| luminous | an object that gives off its own light |
| filament | thin, coiled wire |
| incandescent bulb | tungsten filament resists electricity & glows white |
| fluorescent bulb | powder-coated glass tube;UV light causes gas to glow |
| neon bulb | different gases glow different colors when they absorb energy |
| sodium vapor bulb | heated solid changes from solid to gas and gives off light |
| tungsten-halogen bulb | tungsten filament resists electricity;gas makes filament glow brighter |
| spectroscope | used to view different colors in different bulbs |
| bioluminescence | chemical reaction in organism causes energy given off to be light |
