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L4-06. Refraction In Cloudy Water

Purpose

Demonstrates how a light ray bends when it enters a different medium at an oblique angle.

Equipment

Laser with plastic tank containing water with powdered creamer.

Setup Time

5 minutes.

Images

l4-06

Description

The ray from the laser refracts when entering the surface of the cloudy water. The path of the laser beam in the water is rendered more visible by adding a touch of powdered creamer to the water.

References

Philip DiLavore, Reflection and Refraction at an Interface, TPT 13, 247-248, (1975).