how does an arc lamp help in rescue operations
Answers
Explanation:
The carbon arc lamp consists of two carbon electrodes suspended in free air. In order to ignite an arc lamp, the electrodes are touched together. This generates a low voltage to strike the arc. The rods are slowly withdrawn, the electric current between the electrodes heats, and this maintains an arc through the gap. The heat and current together generates light.
The color of light emitted by these lamps varies with the electrical characteristics, temperature, and time.
Construction
In a carbon arc lamp, the electrodes are made of carbon. They are suspended in air. Current is passed through the electrode using a battery or a dynamo. The carbon rods need to be replaced often, as they tend to burn away. Therefore, solenoids are used in place of carbon electrodes.
Applications
Carbon arc lamps have inherent disadvantages, which have made their usage obsolete. Some of the applications for which these lamps were used in the past are listed below:
Early motion pictures
Searchlights
Projectors
Followspots