IB Physics: Interference

Although it"s not in the syllabus I like to show how the rotating vector model can be used to model the addition of the two light sources. Then use the small angle approximation to show that s = λD/d. Using Geogebra you can animate the whole thing and show that the intensity distribution = cos2(θ/2).The two vectors represents the addition of waves from two slits at different angles. The graph shows the resultant2

To access the entire contents of this site, you need to log in or subscribe to it..

Click the free stuff button on the home page to access free pages or check the blog (which is also free).

All materials on this website are for the exclusive use of teachers and students at subscribing schools for the period of their subscription. Any unauthorised copying or posting of materials on other websites is an infringement of our copyright and could result in your account being blocked and legal action being taken against you.