Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Physics Learning goal 9

Physics Learning Goal 9

  • Login to see the comments

  • Be the first to like this

Physics Learning goal 9

  1. 1. { Double-Slit Interference By Mike Yoon Physics 101 203 14334149
  2. 2.  Early 19th century, Thomas Young performed an experiment that proved light has wave properties. History
  3. 3. Visual representation of the experiment
  4. 4.  The waves in the picture represent the peak of a wave.  When these peaks overlap another peak, the wave is exactly in phase.  The straight lines in the picture represent bright spots due to the constructive interference from the peaks and valleys overlapping.
  5. 5.  Since the waves from the two slits are from the same light source, the waves are exactly in sync but comes out in different holes.  Therefore only a phase difference differs from these two waves.
  6. 6.  The constructive interference occurs when dsin(theta) = m times wavelength  The destructive interference occurs when dsin(theta) = (m+ ½) times wavelength  Where m is an interger  d is the distance between two slits.  Theta is the angle that the bright spot appears on the screen.
  7. 7.  6s2OlKzKQ&spfreload=10 Great youtube video on Double-Slit Interference
  8. 8.  1. The distance between the two slits are 2.56 x 10^-5 m, the wave length is 550 nm while m is 1. Find the angle of the constructive and destructive points. Practice problems
  9. 9.  Theta = 0.021486 rad Answers