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The Chemical Educator

ISSN: 1430-4171 (electronic version)

Table of Contents

Abstract Volume 22 (2017) pp 130-134

Wavelength Analysis of LEDs using Handheld Spectroscopes

Maria Danielle Garrett*,† and Jack B. Garrett

Department of Chemistry and Physics, Belmont University, 1900 Belmont Boulevard, Nashville, Tennessee 37212, danielle.garrett@belmont.edu; HCP Inc, 3000 Meridian Blvd, Ste 200, Franklin, TN 37067
Received April 18, 2017. Accepted June 7, 2017.

Published: 27 July 2017

Abstract. An exploration of the wavelengths of LEDs was developed as a safer alternative to the flame test for introducing and reinforcing the concepts of and relationships among wavelength, frequency and energy in light. Red, yellow, green and blue LEDs were analyzed using handheld spectroscopes. This activity was designed for use in elementary science classes but could be adapted for use in the middle or high school science classroom. A materials list, detailed instructions regarding the wiring and construction of the LED boxes and student versions of the activity handout have been included as supporting information.

Key Words: Laboratories and Demonstrations; general chemistry; elementary/middle school science; high school/introductory chemistry; hands-on learning; spectroscopy

(*) Corresponding author. (E-mail: danielle.garrett@belmont.edu)

Article in PDF format (1290 KB) HTML format

Supporting Materials:

Materials list, detailed instructions regarding the wiring and construction of the LED boxes and student versions of the activity handout. (660 KB)



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