Physics Toolbox Light Sensor

Physics Toolbox Light Sensor


(3 stars)


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10,000 - 50,000 downloads

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This app displays a graph of Luminosity (lux) vs. Time (s) that can be exported to Google Drive or in an e-mail as a .csv file (comma separated values).

Test the brightness/intensity of light sources using your phone light sensor. Use the light sensor to investigate the inverse-square law from a point source of light, true magnitudes of light bulbs (as our eyes do not directly perceive comparative brightness accurately due to the constriction and retraction of the pupil), solar intensity variations dependent upon weather, and the ability of objects and surfaces to absorb, reflect, and/or transmit light.

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A csv file is created and modified on the phone's internal memory.

If you have any questions, comments, or would like to see modifications/updates, please email me at

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Recently changed in this version

Bug fixes.

Comments and ratings for Physics Toolbox Light Sensor
  • (46 stars)

    by Chumpol N. on 06/01/2015

    I like this. I used to adjust the light on some placs

  • (46 stars)

    by Conrad Feder on 05/11/2014

    Needed for a project, thank you.

  • (46 stars)

    by Andrew Hess on 24/09/2014

    Don't listen to the person who said it only has 2 values, it works perfectly, this person was probably testing it with a flashlight in a dark room or something.. Also, the developer tells me that he is working on an RGB version. If you like this app then try out the Physics Toolbox Suite (by the same developer) to take advantage of all of the sensors on your device! It includes this app and

  • (46 stars)

    by subhash subhash on 07/09/2014

    Very good application

  • (46 stars)

    by Shailendra Dhar on 24/08/2014

    It has only two values its either full or zero

  • (46 stars)

    by Subhash Nair on 24/06/2014

    Very simple app

  • (46 stars)

    by Nero M on 13/06/2014

    but icon is very ugly on s4 . seems cut off

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