In crossing the pedestrian bridge over the Salzach river, every step takes me away from the famous view of the fortress over Old Town classics of steeples and baroque in Salzburg. Before I get to where I want to be, I have to cross a busy street in the afternoon rush which has come to a halt. Wailing sirens approach and recede as red and white “Rettungswagen” race to the emergency situation somewhere in the city. The cyclical lights are in my favour, and upon turning the corner, I see the sign that tells me I’ve arrived.
One self-assigned goal during three weeks of travel within Austria was the search for places associated with physicists and mathematicians of my youth. And by youth, I mean the tender twenties when all I cared about was a succinct explanation of the natural world through various equations1. In Alpbach, I found Erwin and Annemarie Schrödinger’s grave. In Vienna, I found Ludwig Boltzmann’s grave. Here in Salzburg across the street from the Mozart family house, I found Christian Doppler after whom the Doppler effect is named.