Discussion:
Ultra violet rays - detection using beads
My science teacher gave me 10 "beads" that have an unusual property... they change color: purple, pink, green etc, with sunlight.
My assignment is to investigate this special property of the beads, and try to determine how they do what they do. I must design and conduct, at home, two original controlled experiments pertaining to this property, one of qualitative (or semi-quantitative) nature and one of a quantitative nature. It must be well controlled only varying one factor at a time in a systematic fashion. It should show good reproducibility, with multiple (identical) trials giving relatively consistent results.
Can you suggest how I can contol and set this experiment up?