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clear
//Given
l=7500*10**-10
d=1.0*10**-6
c=20
//Calculation
//
a=l/d
b=asin(a)*180/3.14
A=2*b
x=c*tan(a*3.14/180.0)
w=2*x
//Result
printf("\n (i) Width of central maximum is %0.0f Degree",A)
printf("\n (ii) Width of central maximum is %0.0f cm",w*10**2)
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