A psychosocial law of temporal summation that describes the relationship between the duration of light and its perceived intensity. The threshold luminance of a stimulus multiplied by the length of time the stimulus is presented for is constant if the time is less than the critical duration. It is assumed that the visual system sums light over a specific period.

Also Known As

  • Bunson-Roscoe-Bloch Law
  • Bunsen-Roscoe Law