Product details

Photometric law of distance with Cobra4 - inverse square law

Photometric law of distance with Cobra4 - inverse square law

Item no.: P2240260
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Measurement Type: with a computer, Mobile (Datalogging)
Experiment Type: Teacher Experiment, Laboratory Experiment

Difficulty Expenditure of Time print
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Principle

The luminous intensity emitted by a punctual source is determined as a function of distance.

Benefits

  • find out how exactly it becomes darker with increasing distance from a lightsource
  • get results fast and reproducible with a data-logging system
  • analize results easily and compare them to theory using a computer

Tasks

  1. The luminous intensity emitted by a punctual source is determined as a function of distance from the source.
  2. The photometric law of distance is verified by plotting illuminance as a function of the reciprocal value of the square of the distance.

What you can learn about

  • Luminous flux
  • Quantity of light
  • Luminous intensity
  • Illuminance
  • Luminance
Document     Filesize
p2240260e.pdf Experiment guide, English 212.22 KB

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