You have a laser pointer and you know the wavelength of the light. You can do this experiment at home and determine the thickness of your own hair if Explain which measurement you made, show your calculationĪnd your result for the diameter of the hair. Observe the diffraction pattern on the screen.Dark fringes in theĭiffraction pattern are found at angles θ forĭrag the slide with the hair into into the path of the laser beam. ![]() Which is proportional to the square of the electric field, therefore is (no mask) is the field produced by source at locations of theįor a laser beam the divergence angle θ 0 isįor angles θ > θ 0 the average intensity, Produced by sources at locations of the mask and E blocker Width w? Using Huygens' principle we haveĮ blocker (no mask) = E non-diffracted beam. What if we remove the mask and only leave the blocker of
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