Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Measuring the wavelength of light using diffraction

  1. Dec 9, 2003 #1
    I did an experiment last week in my college physics class where we measured the wavelength of light using single, double, and multiple slit diffraction and diffraction grating. Using the measurements and Young's equation, we calculated the wavelength of the light. My teacher said that as we use more slits, we should get more accurate results. Can someone explain why this happens?
  2. jcsd
  3. Dec 10, 2003 #2


    User Avatar
    Homework Helper

    Assuming that you are asking:

    I assume that your teacher means that you can more precisely measure the loci of the maxima. The interference is more refined with more slits. It is not that the loci of the maxima are more accurately represented by the formula (I don't think); it is just a matter of being able to determine more exactly where they are.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook