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//ques-22.27
//Calculating angle required for reflection
clc
a=315.2;//edge length (in pm)
d=a/sqrt(1^2+0+0);//for plane 100
w=153.7;//wavelength (in pm)
c=w/(2*d);
//For Sind(ang) = c
ang=14.12;
printf("The angle required for reflection is %.2f degrees.",ang);
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