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

Homework Help: Wave Problem

  1. Mar 14, 2005 #1
    Waves with wavelength 2m pass through a hole in a barrier 10m wide. Compute the angular width of the central maximum.

    I'm not sure what I am finding here. Is it the angel between the central maximum and the 1st nodal line?..........If so am I treating this like a 2 point source problem?

    Any help would be great!
  2. jcsd
  3. Mar 14, 2005 #2

    Chi Meson

    User Avatar
    Science Advisor
    Homework Helper

    This is a "single gap" problem, but the formula is (sometimes) identical to the 2-slit problem. With a single gap, the angular separation from central maximum to the first-order minimum is given with the formula sin theta = (n lambda) / d .

    Here d is the width of the gap and n is the "order" (one in this case).

    With 2-slit interference, d is the separation of the slits, and theta gives you the angular position of the first order maximum.
  4. Mar 15, 2005 #3
    ahh thanks...easier than I thought.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook