# PROBLEM 9 # 

 Standard formula used 
 theta_c = asin(mu2 / mu1) * (180 / pi). 
 NA = sqrt(mu1^2 - mu2^2). 
 theta_0 = asin(NA) * (180 / pi). 

 Maximum radius allowed for fiber is 3.466600 micro meter 
Critical angle = 84.814454 degree. 
 Numerical aperture = 0.132499,
 Maximum incidence angle = 7.614027 degree.