Optical fibres let light pass through even when bent into complex shapes. What does this demonstrate?

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1. Optical fibres let light pass through even when bent into complex shapes. What does this demonstrate?

That light does not actually travel in a straight line at all

That light itself can somehow physically flow like a liquid

That the fibres are simply flexible, or ductile, materials

That the light undergoes repeated total internal reflection as it travels through the bent fibre

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Within a bent optical fibre, light still travels in short straight segments — it just bounces off the fibre’s walls repeatedly through total internal reflection, tracing out the fibre’s overall curved path.