The Fiber Optic Light Guide · AI Generator #GEN-1E5AA82F
Physics · optics
Problem
A straight optical fiber consists of a glass core with refractive index n1=1.50 surrounded by a cladding material with refractive index n2=1.45. The fiber is surrounded by air. Light enters the fiber from air at one end. For the fiber to guide light effectively, light rays must undergo total internal reflection at the core-cladding boundary.
What is the maximum angle θmax (measured from the fiber axis) at which light can enter the fiber from air and still be guided through the fiber?