2.3.60 - Threshold frequency and work function

Understand threshold frequency and work function and use the photoelectric equation hf = φ + ½mvmax².

Use - threshold frequency and work function to connect the rule to the data and decision in the question.

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

Example: apply - threshold frequency and work function to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Threshold frequency and work function is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.