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 min.

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).