| Answer | Crossword Clue |
|---|---|
| prisms | PRISM, a solid which disperses light into a spectrum |
| nicol | a type of prism (a solid which disperses light into a spectrum) |
| nicols | NICOL, a type of prism (a solid which disperses light into a spectrum) |
| prism | a solid which disperses light into a spectrum |
| colours | One, or any mixture, of the constituents into which light can be separated in a spectrum or rainbow, sometimes including (loosely) black and white |
