Explore BrainMass

Explore BrainMass

    Interference of light

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Two glass plates 10cm long are in contact at one end and seperated at the other end by a thread .050 mm in diameter. Light containing two wavelengths 400nm and 600nm is incident perpendicularly. At what distance from the contact point is the next dark fringe?

    Please show me the method step by step.
    Answer 1.2mm

    © BrainMass Inc. brainmass.com March 4, 2021, 5:40 pm ad1c9bdddf
    https://brainmass.com/physics/light-interference/interference-of-light-5148

    Solution Preview

    The diagram is in the attached file.

    From geometry
    d/x=s/l
    or x= d l /s------------- Equation (1)
    where x is the position of dark fringe

    The condition for destructive interference is 2d= m lambda where m=0,1,2

    First dark fringe will be for m=0
    or 2d=0 or d=0 that is at the contact point
    The second dark fringe will be at m=1 or 2d=lambda
    or d= lambda /2
    The third dark fringe will be ...

    Solution Summary

    The solution answers a question on interference of light- distance to the next dark fringe.

    $2.49

    ADVERTISEMENT