1 / 10

Topics

Topics. Young’s double slit experiment with laser light: Determine the wavelength of the laser light. The double slit experiment with white light: Determine the coherence length of white light. Interference and Coherence Length.

sferreira
Download Presentation

Topics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Topics • Young’s double slit experiment with laser light: Determine the wavelength of the laser light. • The double slit experiment with white light: Determine the coherence length of white light.

  2. Interference and Coherence Length • The path length difference must be less than the coherence length of the light. Otherwise no definite phase relationship exists and the interference pattern is not visible. • No problem for laser light (coherence length of order or meters). • White light has much shorter coherence length  Interference pattern only visible for small m.

  3. V I.A. Young’s Double Slit Experiment with Laser Light Screen Large Screen (to keep laser light within your area) Double Slit Laser • Vary slit separation and observe changes. • Measure interference maxima spacing and determine the wavelength of the laser from it.

  4. V I.B Young’s Double Slit Experiment with White Light Diffuser Double Slit Incandescent Light • The double slit interference pattern (if there) will appear when looking against the direction of light propagation through the diffuser. • Try different slit widths. • Estimate coherence length of white light.

  5. V I.B Young’s Double Slit Experiment with White Light Diffuser Double Slit Photometer aperture Incandescent Light • Use the photometer aperture to only let light through one slit. • Observe and explain.

More Related