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Carbon arc lamps are commonly used in

  • Carbon arc lamps are commonly used in Cinema Projector.
  • The carbon arc lamp consists of two carbon electrodes separated by a small gap.
  • When an electric current is passed through the electrodes, the gap between them becomes a highly ionized plasma, which emits light as it heats up.
  • In early cinema projectors, carbon arc lamps were the primary source of light.
  • Due to their high operating temperatures and relatively short lifespan, they were eventually replaced by other types of lamps such as xenon arc lamps and metal halide lamps.