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Question about light intensity and resistance

  1. Mar 22, 2007 #1
    1. The problem statement, all variables and given/known data
    For my physics coursework, I have to design a laboratory experiment using an LDR to investigate how intensity of light emitted from a lamp varies with wavelength. In the procedure I will use diffraction gratings to separate light into wavelengths. The problem I am having is "How a measure of light intensity can be obtained from the LDR" please can anybody show me how to obtain intensity from an LDR.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Mar 22, 2007 #2


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    Staff Emeritus
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    Do you know how a typical LDR works? Do you have the spec sheet for the LDR you are using (something like this) ?
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