Refractive Index - Part 3 - The Reversing Arrow Trick

The video demonstrates an experiment to highlight the refractive index using simple materials. It explains how light bending causes an arrow to appear reversed when viewed through a glass of water. The video provides step-by-step instructions for the experiment and explains the concept of focal distance and focal point.

Explain the concept of focal distance in relation to the experiment.

How does the bending of light relate to the refractive index in this experiment?