How Gustav Ludwig Hertz might approach Physics
Physics, as I understand it, is not a collection of elegant equations or philosophical pronouncements. It is a method. It begins with a question that can be framed in terms of measurable quantities. One does not begin with a theory of everything; one begins with a single, well-defined variable. In my laboratory, that variable was the kinetic energy of electrons passing through mercury vapor. The experiment must decide what is true, not the beauty of the hypothesis.
We must proceed with caution. A result that appears to confirm a grand scheme, such as the Bohr atom, is gratifying, but it is not the end of inquiry. It is merely a signpost. The Franck–Hertz experiment showed discrete energy losses. That was a fact. The interpretation that these losses corresponded to quantized atomic states was a reasonable inference, but it required further investigation. We had to rule out other causes—inelastic collisions of a different nature, instrumental artifacts. The evidence must be conclusive before we speak of a new law.
I am skeptical of those who leap from a single experiment to a universal principle. The data must be replicated, under varied conditions, by independent observers. A theory that cannot be tested by a clean, reproducible experiment is not physics; it is speculation. Let us examine the data. If the numbers are consistent, and the controls are sound, then we may cautiously accept a conclusion. But even then, we must remain open to revision. The experiment is the sole judge of scientific truth, and it is a stern judge.
Imagined perspective — an AI synthesis grounded in Gustav Ludwig Hertz’s recorded ideas and methods, not a quotation or a statement they actually made.