Bragg diffraction

Bragg diffraction is another item that has been suggested several times in comments, and was on my to do list. So here is my first take on it, thanks to a recent comment that reminded me.
In this simulation, the lattice consists in 40 columns of 8 perfectly reflecting scatterers. One can note that the wave is reflected more in specific directions, and that the direction of propagation inside the lattice is different from that of the incoming wave. Note that the picture may look different a larger distance away from the lattice.
The video has two parts, showing the same simulation with two different color schemes:
Wave height: 0:00
Average energy (log scale): 1:53
In the first part, the color hue shows the wave height. In the second part, it shows the energy, averaged from the beginning of the simulation, on a logarithmic scale. There are oscillating boundary conditions on the left side of the simulation, and absorbing boundary conditions on the other sides.

Render time: 31 minutes 38 second
Color scheme: Part 1 - Twilight by Bastian Bechtold
Part 2 - Inferno by Nathaniel J. Smith and Stefan van der Walt

Many thanks to Marco Mancini and Julian Kauth for helping me to accelerate my code!

#wave_equation #waves #diffraction #Bragg_diffraction

[KitagumaIgen]

NICE!
This reminds me of one of the best and most memorable experiments we did in solid-state physics at uni - just this type of X-ray diffraction to determine what crystal-structure some sample had, it was rather finicky to compare the strengths of the different lines and their separation and ordering with the theory - we still got to use photographic film (as far as I recall...).

[will]

Our xray diffraction machine changes angle of the incident beam to get the crystal structure in briggs-bretano sampling

[Canageek]

Very cool. It is a lot harder to pick out specific reflections them I thought it would be! Thank you

[biadzine-eddine]

Have you ever thought about creating a second YouTube channel with only spectacular / dreamy / mesmerizing animations ? Almost like background animations based on the physics animations you make.
That would catch the attention of people, and then they could explore it deeper thanks to the video description
Just a suggestion.
Great work anyway

[ariebaudoin]

nice, would it maybe be cool to only show reflected waves?

[andytroo]

could you show per haps some type of line graph at the edge of your volumes to show the signal strength of that particular slice?