---
title: "A laser used in a spectroscopy experiment emits monochromatic light with a wavelength of \\(663 \\text{ nm}\\). Which of the following is closest to the energy of a single photon emitted by the laser?"
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url: "https://nerd-notes.com/ubq/119637/"
date_modified: "2026-08-21T08:11:53+00:00"
---

# A laser used in a spectroscopy experiment emits monochromatic light with a wavelength of \(663 \text{ nm}\). Which of the following is closest to the energy of a single photon emitted by the laser?

A laser used in a spectroscopy experiment emits monochromatic light with a wavelength of \(663 \text{ nm}\). Which of the following is closest to the energy of a single photon emitted by the laser?

- **A.** \(3.0 \times 10^{-33} \text{ J}\)
- **B.** \(1.0 \times 10^{-27} \text{ J}\)
- **C.** \(3.0 \times 10^{-22} \text{ J}\)
- **D.** \(3.0 \times 10^{-19} \text{ J}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119637/*