dcfmusic on Nostr: Light is internally refracted within the core of the fibre not reflected.
https://m.youtube.com/watch?v=G1Ke-H8I1uk&pp=ygUbaG93IGZpYnJlIG9wdGljIGNhYmxlIHdvcmtz&ra=m
Light is internally refracted within the core of the fibre not reflected.