Early Photoelectric Light Detectors Were Based on Cesium

question 39

Multiple Choice

Early photoelectric light detectors were based on cesium. Cesium metal has a work function of 3.43 *10^-19 J. What is the minimum frequency of electromagnetic radiation required to eject photoelectrons from a cesium surface?

• A) 1.75 *10¹⁴/s
• B) 3.15 * 10¹⁴/s
• C) 5.17 * 10¹⁴/s
• D) 1.55 * 10¹³/s
• E) 7.24 * 10¹⁵/s

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Definitions:

Confidence Interval Estimate

The specific range estimated from the sample data within which the true value of a population parameter is expected to fall with a certain level of confidence.

Normally Distributed

A type of distribution where data points are symmetrically distributed around the mean, forming a bell-shaped curve.

Antioxidants

Substances that can prevent or slow damage to cells caused by free radicals, often found in food.

Null Hypotheses

Hypotheses that propose no statistical significance exists in a set of given observations, suggesting no effect or difference.