Here is my step-by-step-work. Let me know if you have any questions! :)
A traditional thermostat has two pieces of different metals bolted together to form what's called a bimetallic strip (or bimetal strip). The strip works as a bridge in an electrical circuit connected to your heating system. ... Eventually, it bends so much that it breaks open the circuit.
This looks like the photo electric effect ... classical physics reckoned that if you shone an intense enough light beam on a metal you could get electrons ejected from the metal (maybe in analogy to thermionic emission - heat). It sort of "forgot" about the frequency and photon/particle nature of light.
Enter the "photo electric" effect experiment, Einstein's explanation, and the Nobel committee having an excuse to award E a Nobel prize, even though said prize was probably more for relativity.
For the answer to the question above asking <span>What influences the path that surface currents take?</span>
It's the force of the wind that influences the path of surface currents.
I hope my answer helped you. feel free to ask more questions. Have a nice day!