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The level of illumination from a 100 W incandescent lamp will not increase by

  • The level of illumination from a 100 W incandescent lamp will not increase by Increasing filament temperature.
  • The luminous flux emitted by the lamp is directly proportional to the fourth power of the filament temperature, as described by the Stefan-Boltzmann law.
  • In an incandescent lamp, electrical current flows through a thin filament, heating it up and causing it to emit light.
  • As the temperature of the filament increases, so does the amount of light it emits.
  • This is because the filament emits electromagnetic radiation across a wide range of wavelengths, including visible light.