| 100% | ERWIN | 5 | Theoretical physicist Schrödinger |
| 77% | DIRAC | 5 | Theoretical physicist |
| 75% | DIRAC | 5 | Theoretical physicist Paul |
| 75% | PAULI | 5 | Theoretical physicist Wolfgang |
| 72% | ERWIN | 5 | Austrian physicist ___ Schrodinger |
| 72% | ALBERT | 6 | ___ Einstein, theoretical physicist |
| 72% | DIRAC | 5 | English theoretical physicist |
| 72% | STEPHEN | 7 | ___ Hawking, theoretical physicist |
| 70% | HAWKING | 7 | Theoretical physicist depicted in a movie |
| 70% | DIRAC | 5 | English theoretical physicist Paul |
| 68% | ENRICO | 6 | Theoretical physicist Fermi who was not, himself, theoretical |
| 66% | ERWIN | 5 | Nobel-winning physicist ___ Schrodinger |
| 61% | AUSTRIAN | 8 | Nationality of physicist Erwin Schrodinger |
| 60% | SHELDON | 7 | Theoretical physicist Cooper played by Jim Parsons on "The Big Bang Theory" |
| 58% | ERWIN | 5 | Physicist Schrödinger |
| 57% | HAWKING | 7 | 2004 TV film based on the life of English theoretical physicist Stephen |
| 55% | HAWKING | 7 | Stephen —, British theoretical physicist whose books include The Nature of Space and Time |
| 55% | HAWKING | 7 | Stephen ___, English theoretical physicist and cosmologist who studied physics at University College, Oxford |
| 55% | PAUL | 4 | ___ Dirac, English theoretical physicist known for his contributions to quantum mechanics and electrodynamics |
| 55% | FEYNMAN | 7 | Richard ___, theoretical physicist and Nobel Laureate who popularized physics through books and lectures |
| 55% | ERWINS | 6 | Physicist Schrödinger and others |
| 52% | STEPHENHAWKING | 14 | Real-life theoretical physicist portrayed by Eddie Redmayne in "The Theory of Everything": 2 wds. |
| 50% | HAWKING | 7 | Theoretical physicist Stephen, whose life is portrayed by Eddie Redmayne in the 2014 film "The Theory of Everything" |
| 50% | KAKU | 4 | Michio ___, theoretical physicist and New York Times best-selling author who has hosted several TV specials |
| 46% | ERWIN | 5 | Physicist Schrödinger with a "cat in a box" paradox |
| 46% | PAULDIRAC | 9 | Physicist shared 1933 prize with Erwin Schrödinger |
| 45% | ALBERTEINSTEIN | 14 | Nobel Prize-winning theoretical physicist profiled by 54-Across in a biography subtitled "His Life and Universe" (2 wds.) |
| 43% | STEPHEN | 7 | With 47-Across, theoretical physicist and author of 20-Across/28-Across/41-Across who passed away March 14, 2018 |
| 41% | ACADEMIC | 8 | Theoretical |
| 41% | WHATIF | 6 | Theoretical |