| Answer | Crossword Clue |
|---|---|
| dioptrics | the study of light refraction |
| dioptrics | The branch of optics that deals with refraction |
| Answer | Crossword Clue |
|---|---|
| dioptrics | the study of light refraction |
| dioptrics | The branch of optics that deals with refraction |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.