Why must cladding have a low refractive index compared to the core material in optical fibres? - Quora
![A fibre optic cable has a transparent core of refractive index 1.6 and the cladding has a refractive index of 1.5. An optical signal travels along path A and another signal travels A fibre optic cable has a transparent core of refractive index 1.6 and the cladding has a refractive index of 1.5. An optical signal travels along path A and another signal travels](https://d10lpgp6xz60nq.cloudfront.net/physics_images/IJA_PHY_V02_C13_E01_096_Q01.png)
A fibre optic cable has a transparent core of refractive index 1.6 and the cladding has a refractive index of 1.5. An optical signal travels along path A and another signal travels
![An optical fiber consists of a glass core (index of refraction 1.55) surrounded by a cladding (index of refraction 1.52). Suppose a beam of light enters the fiber from air at an An optical fiber consists of a glass core (index of refraction 1.55) surrounded by a cladding (index of refraction 1.52). Suppose a beam of light enters the fiber from air at an](https://homework.study.com/cimages/multimages/16/diagram_45907396334400435329.png)
An optical fiber consists of a glass core (index of refraction 1.55) surrounded by a cladding (index of refraction 1.52). Suppose a beam of light enters the fiber from air at an
![Optical fibre types. Shading represents areas of higher refractive index. | Download Scientific Diagram Optical fibre types. Shading represents areas of higher refractive index. | Download Scientific Diagram](https://www.researchgate.net/publication/231149482/figure/fig1/AS:669094122647558@1536535878434/Optical-fibre-types-Shading-represents-areas-of-higher-refractive-index.png)
Optical fibre types. Shading represents areas of higher refractive index. | Download Scientific Diagram
![Cross section along optical fiber axis. The core refractive index, n co... | Download Scientific Diagram Cross section along optical fiber axis. The core refractive index, n co... | Download Scientific Diagram](https://www.researchgate.net/publication/26254718/figure/fig2/AS:667715438116880@1536207174937/Cross-section-along-optical-fiber-axis-The-core-refractive-index-n-co-145-is.png)