31. Total internal reflection was often used to avoid the light loss in reflection from a silvered mirror. 32. This effect, called total internal reflection , is used in optical fibers to confine light in the core. 33. Wardell's conversion to the Roman Catholic faith was the result of a period of deep internal reflection . 34. Rainbows are the result of a combination of internal reflection and dispersive refraction of light in raindrops. 35. "Two or three members require a little further time for internal reflection and consultation, " he said. 36. The Excelsior that we present today springs from a difficult but necessary process of internal reflection and self-criticism. 37. If the photons reside mainly in the higher index material, the confinement is due to total internal reflection . 38. Figure " DTIRC " ( Dielectric Total Internal Reflection Concentrator ) on the left shows one such example. 39. Kern arc rays undergo an internal reflection off a side face inclined at 60?to the exit face. 40. Such reduction in reflectivity is contributed by the cone geometry, which increases the light internal reflections between them.