Shunkleburger, 7 months ago to architecture

Door to your heart.

#abandoned, #access, #aged, #ancient, #antique, #architecture, #area, #background, #blockade, #blue, #boundary, #brown, #close, #coatings, #contrast, #corrosion, #decayed, #detail, #dirty, #door, #entrance, #erosion, #fence, #gate, #green, #grunge, #iron, #lock, #metal, #metallic, #object, #old, #open, #outdoor, #padlock, #paint, #protection, #red, #restricted, #retro, #rust, #rusty, #secure, #security, #steel, #structure, #texture, #time, #vintage

pfsmet, 10 months ago to random Dutch

Although this pond has everywhere the same depth, it appears a lot deeper on the near side. Light rays are bent when they cross the water-air interface (Snell’s law), distorting the image. The more perpendicular you look (near side), the less it’s distorted. #SummerOfPhysics (A daily toot on physics in everyday life. That's the plan.) 1/n

Photo of Snell’s law painted on a wall in Leiden (#muurformule). Via https://muurformules.nl/?ln=nl