the necessary condition for propagation of light though optical fibra is
Answers
Answer:
The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances.
Step-by-step explanation:
Suppose you want to shine a flashlight beam down a long, straight hallway. Just point the beam straight down the hallway -- light travels in straight lines, so it is no problem. What if the hallway has a bend in it? You could place a mirror at the bend to reflect the light beam around the corner. What if the hallway is very winding with multiple bends? You might line the walls with mirrors and angle the beam so that it bounces from side-to-side all along the hallway. This is exactly what happens in an optical fiber.
The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances
The necessary condition for the propagation of light through the optical fiber is given by:
- The propagation of light here takes place to reflection from the inside part.
- Whenever light is passed through the fiber, it hits the inner surface of the fiber.
- After hitting, as we know the properties of light, scattering of light inside the fiber in a conical direction is observed.
- Here, the critical angle is greater than the angle of refraction as there is scattering of light in large amount and covers the majority of the area.
- The mentioned process is impossible without reflection.
- Therefore, the reflection of light plays an important role.