---
title: "An experiment is conducted to investigate the photoelectric effect using two different metal plates, Metal 1 and Metal 2, whose work functions satisfy \\(\\Phi_1 < \\Phi_2\\). Monochromatic light of wavelength \\(\\lambda\\) shines on each metal target, producing photoelectrons with measured stopping potentials of \\(V_1\\) and \\(V_2\\), respectively.  | Target Metal | Work Function | Measured Stopping Potential | |—|—|—| | Metal 1 | \\(\\Phi_1\\) | \\(V_1\\) | | Metal 2 | \\(\\Phi_2\\) | \\(V_2\\) |  The experiment is then repeated using monochromatic light with half the original wavelength, \\(\\frac{\\lambda}{2}\\). How does the new stopping potential \\(V_1'\\) for Metal 1 compare to \\(2V_1\\), and how does the new difference in stopping potentials \\((V_1' – V_2')\\) compare to the original difference \\((V_1 – V_2)\\)?"
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url: "https://nerd-notes.com/ubq/117424/"
date_modified: "2026-08-04T06:52:06+00:00"
---

# An experiment is conducted to investigate the photoelectric effect using two different metal plates, Metal 1 and Metal 2, whose work functions satisfy \(\Phi_1 < \Phi_2\). Monochromatic light of wavelength \(\lambda\) shines on each metal target, producing photoelectrons with measured stopping potentials of \(V_1\) and \(V_2\), respectively.

| Target Metal | Work Function | Measured Stopping Potential |
|—|—|—|
| Metal 1 | \(\Phi_1\) | \(V_1\) |
| Metal 2 | \(\Phi_2\) | \(V_2\) |

The experiment is then repeated using monochromatic light with half the original wavelength, \(\frac{\lambda}{2}\). How does the new stopping potential \(V_1'\) for Metal 1 compare to \(2V_1\), and how does the new difference in stopping potentials \((V_1' – V_2')\) compare to the original difference \((V_1 – V_2)\)?

An experiment is conducted to investigate the photoelectric effect using two different metal plates, Metal 1 and Metal 2, whose work functions satisfy \(\Phi_1 < \Phi_2\). Monochromatic light of wavelength \(\lambda\) shines on each metal target, producing photoelectrons with measured stopping potentials of \(V_1\) and \(V_2\), respectively.

| Target Metal | Work Function | Measured Stopping Potential |
|---|---|---|
| Metal 1 | \(\Phi_1\) | \(V_1\) |
| Metal 2 | \(\Phi_2\) | \(V_2\) |

The experiment is then repeated using monochromatic light with half the original wavelength, \(\frac{\lambda}{2}\). How does the new stopping potential \(V_1'\) for Metal 1 compare to \(2V_1\), and how does the new difference in stopping potentials \((V_1' - V_2')\) compare to the original difference \((V_1 - V_2)\)?

- **A.** \(V_1' = 2V_1\) and \((V_1' - V_2') = 2(V_1 - V_2)\)
- **B.** \(V_1' = 2V_1\) and \((V_1' - V_2') = V_1 - V_2\)
- **C.** \(V_1' > 2V_1\) and \((V_1' - V_2') = 2(V_1 - V_2)\)
- **D.** \(V_1' > 2V_1\) and \((V_1' - V_2') = V_1 - V_2\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/117424/*