PURPOSE: To demonstrate how index of refraction affects what we see in a fluid bath.
DESCRIPTION: Glass seems to disappear when immersed in a liquid with the same index of refraction. The bottles, left to right, contain air, water, and two with microscope immersion oil, a liquid with almost the same index of refraction as glass . Bottles are available to pass around class.
SUGGESTIONS:
EQUIPMENT: Eye-dropper bottles containing air, water, and microscope immersion oil.
SETUP TIME: None.
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