Physics · Optics
A step-index optical fiber has refractive indices n1 = 1.474 for the core region and n2 = 1.470 for the cladding region. A ray of light is incident from air into the core through the cross-section of the fiber at an angle θ with the normal. What is the limiting value of θ below which the light ray will undergo total internal reflection inside the fiber?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 16.229°✓
- 22.862°
- 358.194°
- 44.222°
Correct answer
6.229°
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