





1 Robbert Dijkgraaf inaugurates the first wall formula (Nov 2015)


2 Einstein's gravitational formula, on the wall of museum Boerhaave


3 The crossing on Hogewoerd, with Snell's law in the distance


4 Snell's law, inaugurated November 2016









5 Lorentz force formula, opposite Lorentz's house on Hooigracht


6 The Lorentz force formula, inaugurated November 2016


7 The Lorentz force formula, on the wall of Cafe de Hooikist


8 Lorentz contraction, railway crossing MorswegHaagweg, 2017










10 The contraction effect can be viewed from a train


11 Oort constants, facing the Observatory (2017)


12 Uhlenbeck and Goudsmit's electron spin (Gerecht, 2017)







13 The Huygens pendulum on the fire brigade tower (2019)


14 SenseJan and Ivo, designing the next wall formula


