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clear;
clc;
printf("\nEx2.7\n");
//page no.-57
//given
h=6.6*10^-34;...............//planck constant in Joule-sec
m=9.1*10^-31;..................//mass of e in kg
c=3*10^8;....................//speed in m/sec
lambda=h/(m*c)................//wavelength in angstrom
printf("\nwavelength of quantum of energy is 0.0244 angstrom\n");
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