For Potassium Metal, the Work Function (The Minimum Energy

question 22

Multiple Choice

For potassium metal, the work function (the minimum energy needed to eject an electron from the metal surface) is 3.68 × 10^-19 J. Which is the longest wavelength of the following which could excite photoelectrons?

• A) 550. nm
• B) 500. nm
• C) 450. nm
• D) 400. nm
• E) 350. nm

---

Definitions:

Routing Patterns

The planned paths or sequences followed by people or goods as they move from one location to another.

ELMS System

An acronym that could refer to various systems, commonly denoting an Electronic Learning Management System.

80/20 Principle

Also known as the Pareto Principle, it suggests that roughly 80% of effects come from 20% of causes, commonly applied in business and economics.

FAB Closing

A sales technique that emphasizes the Features, Advantages, and Benefits of a product or service during the closing phase of a sales pitch.