You will need :- A beaker of water, some soap, an electrical torch or a laser torch

Method :- Mix some soap in water in the beaker. (without allowing to form lather)
Direct a thin inclined beam of light using the electrical torch or laser torch.
Observe how the path of light beam changes when it enters into water.
questions - 1) at what place did the beam of light bend
2) what is the reason for mixing soap into water.

please answer these questions.
If you answer correctly, I will definitely mark you as brainlist
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