Let's learn a little of physics.
What you see in the image above is named "Chladni figures": "patterns formed by a granular substance on a flat surface vibrating in an own way.
As mechanical waves propagate through an extended object, they do so in all directions. Depending on the characteristic lengths of the body, the boundary conditions that it imposes on the waves can induce the resonance of some of the frequency components of the incident disturbance.
Depending on the vibrational frequency used, you will get one type of drawing or another." (Source: Wikipedia)
Image: at SeCyT 2016. Using differents colour sands, and a type of vibrational frequency, we get the image above.
Siguiendo la corriente de la comunidad CityDailyPhoto, me he propuesto dejar en este blog fotos de Murcia, como forma de mostrar al mundo qué joya de ciudad y de provincia tenemos. Agradecer al creador de ParisDailyPhoto su gran idea de mostrar la ciudad de uno mismo desde otro punto de vista. Following the tide of community CityDailyPhoto, I proposed to leave in this blog photos of Murcia, as a way to show to the world what a jewel of city and province we have. Thanks to the creator of ParisDailyPhoto for his great idea to show the city of oneself from another angle.
The Region of Murcia is located in the southeastern of Spain, between Andalusia (west), Castilla-La Mancha (North), Valencia (East) and the Mediterranean Sea (South).
The city of Murcia is the capital of the Region. Other major cities are: Cartagena, Lorca, Caravaca de la Cruz, Jumilla, Yecla, Bullas, Mazarrón, Aguilas ...