Number of interference fringes based on n open slits

AI Thread Summary
The discussion addresses the calculation of the number of interference fringes produced by multiple slits, emphasizing the importance of knowing the wavelength of light, slit size, separation, and distance to the screen. An equation exists for this purpose, and users are encouraged to search for "interference for n sources" for detailed guidance. The principles discussed are applicable not only to optics but also to multiple RF antennas. The conversation suggests that the topic is standard in physics literature. Understanding these concepts is essential for accurate calculations in interference patterns.
sqljunkey
Messages
181
Reaction score
8
Hi,

Is there an equation that gives you the number of interference fringes if you know the light wave length, size and separation of the slits, and length from the slits to the screen?
 
Science news on Phys.org
Absolutely. Have you searched Google for “ interference for n sources” ? It really is just standard book work. Same formulae for multiple RF antennae if you find any problems.
 
Thread 'A quartet of epi-illumination methods'
Well, it took almost 20 years (!!!), but I finally obtained a set of epi-phase microscope objectives (Zeiss). The principles of epi-phase contrast is nearly identical to transillumination phase contrast, but the phase ring is a 1/8 wave retarder rather than a 1/4 wave retarder (because with epi-illumination, the light passes through the ring twice). This method was popular only for a very short period of time before epi-DIC (differential interference contrast) became widely available. So...
I am currently undertaking a research internship where I am modelling the heating of silicon wafers with a 515 nm femtosecond laser. In order to increase the absorption of the laser into the oxide layer on top of the wafer it was suggested we use gold nanoparticles. I was tasked with modelling the optical properties of a 5nm gold nanoparticle, in particular the absorption cross section, using COMSOL Multiphysics. My model seems to be getting correct values for the absorption coefficient and...
Back
Top