//Example No.2.4;
//Page No.60;
clc;clear;
E1 = 3.2;//Value of higher energy level E1 -[eV].
E2 = 1.6;//Value of lower energy level E2 -[eV].
E = (E1-E2);//Energy difference.
printf("\nThe energy difference is %.1f eV", E);
h = 6.626*10^(-34);//Planck's constant
c = 3*10^(8);//Velocity of light.
E = 1.6*1.6*10^(-19);
w = ((h*c)/(E));
printf("\nThe wavelength of the photon is %3.3e m", w);