| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Photodegradation is chemical change affecting the usefulness of a material due to absorption of this | light | $200 | J | CHEMISTRY | 2016-12-22 | #7429 | |
| Etymologically, phosphorus refers to something that is "bearing" this | light | $2,000 | DJ | ELEMENTAL ETYMOLOGY | 2009-10-09 | #5765 | |
| Photochemistry studies the effect of this on substances | light | $400 | DJ | CHEMISTRY | 1987-02-23 | #576 |