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What are Fiber Optics?

Fiber optics is a subset of optics that deals with how light behaves in fibers. Fibers are cables that are made of materials like glass or plastic and clad in something with a lower index of refraction than the core. Choosing the appropriate materials for the core and...

What is Refraction?

Refraction is when a light beam changes direction after entering a new medium. This is why objects in the water are seen at a different place from where they actually are; the light has been “bent” when exiting the water. The image below shows light being refracted...

What is intensity of light?

When talking about light, intensity is the power per unit area when the light is transmitted through a (real or imaginary) flat surface that is perpendicular to the direction of the beam. It is usually represented by the symbol I and common units are W/m2 or W/cm2. At...
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