Detecting Counterfeit Money experiment

To develop a method for determining if U.S. currency is authentic or counterfeit.

Safety Precautions: Do only under adult supervision. Do not stare at the black light, as ultraviolet light can be harmful to the eyes.

Must have a dark room, place the various US bills under the black light. Observer the color of the plastic strip within each bill.

Explanation:
All new bills within the United States (Expect for the one dollar bill) have recently been redesigned. Each contains a thin, narrow plastic strip embedded within the bill itself, which is only visible if held up to the light. The strip within each type of bill will fluoresce a specific color if placed under an ultraviolet light. In the $5 bill, the strip will be blue. In the $10 bill, the strip will be orange. The $20 bill contains a yellow-green strip. In the $50 bill the strip will be yellow orange. The $100 bill contains a pink strip. These colors will vary somewhat under different wavelengths of ultraviolet light. It would be extremely difficult for a counterfeiter to place this strip with a counterfeit bill.