In the Franck-Hertz Experiment on Potassium Shows a Threshold Occurs

question 27

Multiple Choice

In the Franck-Hertz experiment on potassium shows a threshold occurs at 1.55 eV, what which of the following wavelengths would you expect to observe just above this threshold?

• A) 155 nm
• B) 374 nm
• C) 400 nm
• D) 600 nm
• E) 800 nm

---

Definitions:

Positive or Negative

refers to the nature of emotions, experiences, or outcomes as being either beneficial and desirable (positive) or harmful and undesirable (negative).

Pygmalion Effect

The phenomenon where higher expectations lead to an increase in performance; a form of self-fulfilling prophecy.

Self-fulfilling Prophecy

A belief or expectation that influences one's behavior in a way that causes the belief to become true.

Selective Perception

The process by which individuals perceive what they want to in media messages while ignoring opposing viewpoints.