[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

physics/photoelectric_effect.py

@@ -60,7 +60,10 @@ def maximum_kinetic_energy(
         return max(PLANCK_CONSTANT_EVS * frequency - work_function, 0)
     return max(PLANCK_CONSTANT_JS * frequency - work_function, 0)
 
-def calculate_work_function(frequency: float, kinetic_energy: float, in_ev: bool = False) -> float:
+
+def calculate_work_function(
+    frequency: float, kinetic_energy: float, in_ev: bool = False
+) -> float:
     """
     Calculates the work function of a surface using the given frequency and kinetic energy.
 
@@ -100,6 +103,7 @@ def calculate_work_function(frequency: float, kinetic_energy: float, in_ev: bool
         return PLANCK_CONSTANT_EVS * frequency - kinetic_energy
     return PLANCK_CONSTANT_JS * frequency - kinetic_energy
 
+
 if __name__ == "__main__":
     import doctest