| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| (Sarah of the Clue Crew demonstrates.) The beads here have been specially treated so that indoors they'rewhite, but when you take them outside and they're exposed to these invisible rays that can give you a sunburn, they change color | ultraviolet rays | $400 | J | SCIENCE | 2015-12-08 | #7187 | |
| Known as "black light" because most of them can't be seen with the naked eye | ultraviolet rays | $600 | DJ | SCIENCE | 1985-01-04 | #85 |