---
title: "A student shines monochromatic light of various frequencies \\(f\\) onto a metal plate in an evacuated tube and measures the maximum kinetic energy \\(K_{\\max}\\) of the emitted photoelectrons. The graph shows the measured maximum kinetic energy as a function of the light frequency. Based on the graph, what is the work function of the metal plate?"
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url: "https://nerd-notes.com/ubq/117389/"
date_modified: "2026-08-04T06:52:02+00:00"
---

# A student shines monochromatic light of various frequencies \(f\) onto a metal plate in an evacuated tube and measures the maximum kinetic energy \(K_{\max}\) of the emitted photoelectrons. The graph shows the measured maximum kinetic energy as a function of the light frequency. Based on the graph, what is the work function of the metal plate?

A student shines monochromatic light of various frequencies \(f\) onto a metal plate in an evacuated tube and measures the maximum kinetic energy \(K_{\max}\) of the emitted photoelectrons. The graph shows the measured maximum kinetic energy as a function of the light frequency. Based on the graph, what is the work function of the metal plate?

![A Cartesian graph plotting maximum kinetic energy K_{max} in units of 10^{-19} J on the vertical axis against light frequency f in units of 10^{14} Hz on the horizontal axis. The vertical axis runs from 0 to 7.0 in steps of 1.0. The horizontal axis runs from 0 to 12.0 in steps of 2.0. A straight solid line starts at the horizontal intercept (5.0, 0) and slopes upward to the right, passing through (10.0, 3.3). Discrete data points are marked along the line at (6.0, 0.66), (8.0, 1.98), and (10.0, 3.30). No other text or lines appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1785826322-hv2te5.jpg)

- **A.** \(1.65 \times 10^{-19} \text{ J}\)
- **B.** \(3.3 \times 10^{-19} \text{ J}\)
- **C.** \(6.6 \times 10^{-19} \text{ J}\)
- **D.** \(9.9 \times 10^{-19} \text{ J}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/117389/*