1 / 7

Snell’s Law

Snell’s Law. STARTER. Which index is the largest?. Index of Refraction, n. c = 3x10 8 m/s speed of light in vacuum v = speed of light in the medium. Example: The speed of light in a clear plastic is 2.5 x 10 8 m/s. What is its index of refraction?.

haven
Download Presentation

Snell’s Law

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. Snell’s Law STARTER Which index is the largest?

  2. Index of Refraction, n c = 3x108 m/s speed of light in vacuum v = speed of light in the medium Example: The speed of light in a clear plastic is 2.5 x 108 m/s. What is its index of refraction? n = c/v = (3 x 108)/ (2.5 x 108)= 3/2.5 = 1.20

  3. Snell’s Law =

  4. Example A light ray in air crosses into oil. The incident angle is 55 degrees and the refracted angle is 30 degrees. Find: The index of refraction for the oil. The speed of light in the oil. 1. = ; 2. v = c/n = 1.83 x 108 m/s

  5. Total Internal Reflection = = = ( )

  6. Example Find the critical angle for a water/air interface. = ( ) = ( ) = 48.7o

  7. Exit Problem A layer of glass ( n=1.65) sits on a layer of clear plastic ( n=1.49). What is the critical angle for the interface?

More Related