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clc
// Given That
a = 12e-5 // slit width in cm
lambda = 6e-5 // wavelength in cm
//Sample Problem 26 Page No. 57
printf("\n # Problem 26 # \n")
printf(" \n Standard formula used \n a*sin(theta ) = lambda \n")
theta = asin((lambda / a))
printf(" Half angular width of central bright maxima is %d degree .", ceil (theta * 180 / %pi) )
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