| Answer | Crossword Clue |
|---|---|
| DELTA | Type of ray, wave or wing |
| HEAT | Kind of ray or wave |
| BETA | Kind of ray or wave |
| refraction | deflection from a straight path undergone by a light ray or energy wave in passing obliquely from one medium (as air) into another (as glass) in which its velocity is different |
| DELTA | Kind of wing or wave |
| supercritical | Denoting an airfoil or aircraft wing designed to tolerate shock-wave formation at transonic speeds |
