| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| The Curies gave Paul Villard some radium & he discovered these very high-energy Greek-letter rays | gamma rays | $1,600 | DJ | DISCOVERIES IN SCIENCE | 2021-04-07 | #8373 | |
| The radiation type with the shortest wavelength, these Greek-letter rays are used in medical diagnosis & therapy | gamma rays | $800 | DJ | SCIENCE | 2020-03-12 | #8179 | |
| Named for the third Greek letter, they resemble X rays but have shorter wavelengths | Gamma rays | $100 | J | PHYSICAL SCIENCE | 2000-05-16 | #3627 |