---
title: "A student uses a spectrometer to test a blue LED used in a fluorescence sensor. The maximum emission from the LED occurs at a wavelength of \\(4.50 \\times 10^2 \\text{ nm}\\). Use \\(h=6.63\\times10^{-34}\\text{ J s}\\) and \\(c=3.00\\times10^8\\text{ m/s}\\).  What is the energy of a single photon emitted by the LED?"
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url: "https://nerd-notes.com/ubq/119378/"
date_modified: "2026-08-19T12:40:04+00:00"
---

# A student uses a spectrometer to test a blue LED used in a fluorescence sensor. The maximum emission from the LED occurs at a wavelength of \(4.50 \times 10^2 \text{ nm}\). Use \(h=6.63\times10^{-34}\text{ J s}\) and \(c=3.00\times10^8\text{ m/s}\).

What is the energy of a single photon emitted by the LED?

A student uses a spectrometer to test a blue LED used in a fluorescence sensor. The maximum emission from the LED occurs at a wavelength of \(4.50 \times 10^2 \text{ nm}\). Use \(h=6.63\times10^{-34}\text{ J s}\) and \(c=3.00\times10^8\text{ m/s}\).

What is the energy of a single photon emitted by the LED?

- **A.** \(8.95\times10^{-32}\text{ J}\)
- **B.** \(4.42\times10^{-19}\text{ J}\)
- **C.** \(6.63\times10^{-19}\text{ J}\)
- **D.** \(4.42\times10^{-16}\text{ J}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119378/*