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//Chapter-2,Example2_2_4,pg 2-11
a=0.16*10^-3 //width of slit
n=1 //for first minimum
wavelength=5600*10^-10 //wavelength of light
angle=asind(n*wavelength/a) //angular seperation
printf('\nThe half angular width of a principal maximum is angle = %.4f degrees\n',angle)
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