# PROBLEM 2 # 

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

 Refractive index of cladding is 1.326000. 
 Numerical aperture is 0.304105.
 Acceptance angle is 17.704341 degree.