Photoelectric Effect: a Metal Having a Work Function of 2

question 26

Multiple Choice

Photoelectric effect: A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV. What is the threshold frequency for photoelectron production? (h = 6.626 × 10^-34 J ∙ s, 1 eV = 1.60 × 10^-19 J)

• A) 6.8 × 10¹⁴ Hz
• B) 2.7 × 10¹⁴ Hz
• C) 7.6 × 10¹⁴ Hz
• D) 8.5 × 10¹⁴ Hz
• E) 9.4 × 10¹⁴ Hz

---

Definitions:

Pancreas

A glandular organ located in the abdomen that plays a crucial role in digestion and insulin production.

Endocrine Glands

Glands in the body that release hormones directly into the bloodstream to regulate various bodily functions.

Sympathetic Nervous System

Part of the autonomic nervous system that activates the body's fight-or-flight response during perceived threats.

Stress

A physical, mental, or emotional factor that causes bodily or mental tension and may be a factor in disease causation.