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Option 2 : Flash cameras
- In an arc lamp electric current is made to flow through two electrodes. When two rods touch it produces hot arc resulting in light due to vaporization of some of the carbon.
- Carbon lamps are used in cinema projector, search light and flash camera because it produces a high-intensity white light.
| Lamp | Application |
| Neon discharge lamp | Used as night lamps and as indicator lamps and used for the determination of the polarity of DC mains and for advertising purpose |
| Sodium vapor lamp | Used for highway and street lighting, parks, railway yards, general outdoor lighting |
| Mercury vapor lamp | Industrial lighting, ports, shopping centers, railway yards |
| Carbon arc lamp | Cinema projector, search light and flash camera |
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