Answered: An LED emits light with a wavelength of…

An LED emits light with a wavelength of 500 nm (500x10-⁹m). What is the band gap energy in electron Volts? Hint: recall Eq. (2) and 1 eV= 1.6 x10-19 J 1.2 eV 2.5 eV 3.3 eV 4.1 eV 5.5 eV

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter9: Condensed Matter Physics

Section: Chapter Questions

Problem 66P: For a one-dimensional crystal, write the lattice spacing (a) in terms of the electron wavelength.

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Question

An LED emits light with a wavelength of 500 nm (500x10-9m). What is the band gap
energy in electron Volts?
Hint: recall Eq. (2) and 1 eV= 1.6 x10-19 J
1.2 eV
2.5 eV
3.3 eV
4.1 eV
5.5 eV

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