2.3.34 - Wave equation

Be able to use the wave equation v = fλ.

Use - wave equation to connect the rule to the data and decision in the question.

This matters because - wave equation determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - wave equation to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: use the formula and units given in the question, show the substitution and interpret the result; the calculation alone is not the conclusion.