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clear;
clc;
printf("\nEx2.7\n");
//page no.-57
//given
m=1.66*10^-24;..........//mass of proton in gm
e=4.8*10^-10;.............//charge in e.s.u.
h=6.62*10^-27;.............//planck's constant in erg-sec
E=1.6*10^-7;.............//energy in ergs
//we knoe , E=m*v^2/2
v=sqrt((2*E)/m);..........//velocity in m/s
//By debroglie relationship
lambda=h/sqrt(2*m*E)...........//wavelength in cm
printf("\nwavelength is 9.08*10^-14 m\n");
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