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//Chapter-2,Example2_4_2,pg 2-24
//as a mth order of wavelength 5400 A. is superimposed on (m+1)th order of wavelength 4050 A.
angle=30 //angle of diffraction
wavelength_1=5400 //for mth order
wavelength_2=4050 //for (m+1)th order
m=wavelength_2/(wavelength_1-wavelength_2)
N=(sind(angle)/(m*wavelength_1))*10^8 //Number of lines per cm
printf('\nNumber of lines per cm N = %.2f',N)
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