. Light, a textbook for students who have had one year of physics. totalreflection is seen in the case of a cut diamond. The index ofdiamond with respect to air being so large, its critical angleis correspondingly small, and a diamond owes its brilliancepartly to this fact and partly to the additional fact that itsindex for different colors differs large-ly, so that for certain angles of in-cidence the shorter waves are totallyreflected while the longer ones arenot. Let figure 25 represent a cross-section of a cut diamond. Not onlythe ray aaa, but the very oblique onebbbb may undergo total ref
. Light, a textbook for students who have had one year of physics. totalreflection is seen in the case of a cut diamond. The index ofdiamond with respect to air being so large, its critical angleis correspondingly small, and a diamond owes its brilliancepartly to this fact and partly to the additional fact that itsindex for different colors differs large-ly, so that for certain angles of in-cidence the shorter waves are totallyreflected while the longer ones arenot. Let figure 25 represent a cross-section of a cut diamond. Not onlythe ray aaa, but the very oblique onebbbb may undergo total reflection atthe two surfaces XZ and YZ. More-over, if the b ray happens to strike one of these surfaces at the critical angle for green light, for in-stance, the waves of shorter length will strike it at an angle•rreater than the critical, the waves of greater length at anangle less. For, since the index is greater for short than forlong waves, the critical angle is greater for long than for , red rays, will escape total reflection and be par-. :,s IJGHT
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectlight, bookyear1921
