Now and then physicists have invaded other fields with success, sometimes embarrassing the natives. For example, Max Delbruck and the phage group, Crick and DNA, Seymour Benzer, Walter Gilbert, Alvarez and the K-T extinction, etc.
But sometimes it doesn’t turn out so well. I remember a physicist who thought he had invented the perfect weight-loss diet: you drank lots of cold water, which require lots of calories to warm up, and thus you would lose weight. Problem was, he hadn’t noticed that there is a differences between gram calories (the amount of energy required to raise the temperature of one gram of water by one degree C) and food calories, the amount of energy required to raise the temperature of one kilogram of water by one degree.
His diet worked, but you had to drink a thousand times more cold water than in his original estimate, which made for an inordinate number of pit stops.