Applications of Total Internal Reflection (Leaving Cert Physics): Flashcards

Light from denser to less dense medium, angle $>$ critical angle

Embedded in road surfaces and lane markings

Light returns directly to observer, not scattering

Three plane mirrors at right angles to each other

Reflects off 3 mirrors, emerges parallel to original direction

Thin glass strands transmitting light via total internal reflection

Core surrounded by cladding with lower refractive index

Angle at core-cladding boundary $>$ critical angle

Too sharp: angle $<$ critical angle, light escapes

Faster data transfer, less signal loss over long distances

Medical device using optical fibres to see inside body

One bundle carries light in, another carries reflected light out

Minimally invasive surgery using optical fibres

Less pain, fewer complications, faster recovery, shorter stay