This difference in refractive indices is crucial for the functioning of optical fibers. 3. Total Internal Reflection: For light to be transmitted efficiently through the optical fiber, it must undergo total internal reflection. This occurs when light travels from a denser medium (core) to a rarer...
The luminescent light produced by X-rays in the (I)-crystals on the wall passes to the carrier and passes through an optically denser medium. (I) to an optically less dense medium, the cell walls. Alternatively the luminescent light is reflected on the cell walls by a reflection layer. ...