   Chapter 7.6, Problem 1.5ACP

Chapter
Section
Textbook Problem

Europium oxide (Eu2O3) is used in the production of red phosphors for television displays. If the europium compound emits light with a wavelength of 612 nm, what is the frequency (s‒1) and energy (J/photon) of the light?

Interpretation Introduction

Interpretation:

The frequency and energy values have to be calculated.

Concept Introduction:

De-broglie equation: This equation widely used to describe the wave properties of matter, specifically, the wave nature of the electron λ = h/mv, where λ is wavelength, h is Planck's constant, m is the mass of a particle, moving at a velocity v. de Broglie suggested that particles can exhibit properties of waves.

Explanation

First we calculate the frequency values of the given statement:

Let us consider the fallowing de-Broglie equation

ν=cλHereν=frequency(tobecalculate)c=3×108m/sλ=6.12×107m(or)612nmThevaluesaresubstitutedequation(1)ν=3×108m/s6.12×107m=4

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