Find the numerical aperture and acceptance angle of an optical fiber if the refractive indices of the core and cladding are 1.562 and 1.497 respectively.
a) Numerical aperture = 0.395, Acceptance angle = 23.26°
b) Numerical aperture = 0.395, Acceptance angle = 26.57°
c) Numerical aperture = 0.355, Acceptance angle = 23.26°
d) Numerical aperture = 0.355, Acceptance angle = 26.57°
