M4-31: IRIDESCENT BOTTLE

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PURPOSE: To demonstrate iridescence from thin film interference.

DESCRIPTION: Iridescence involves production of colors due to interference. Here the interference between light reflecting from the two surfaces of a thin celophane sheet inside the bottle lead to beautiful but faint partially saturated colors.

SUGGESTIONS:

REFERENCES: None. (PIRA unknown.)

EQUIPMENT: Iridescent bottle.

SETUP TIME: 10 minutes.


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