|
Across
| 3 | | Inventor of the telescope. (7) |
| 5 | | A part of most optical instruments. (4) |
| 6 | | Occurs when light encounters the
boundary between two media of
different densities. (10) |
| 8 | | Points to which parallel rays
converge. (5) |
| 9 | | Triangular glass object used to
disperse white light into its
component colours. (5) |
| 10 | | A source of light. (4) |
| 11 | | Law of refraction is due to this
Dutch scientist. (5) |
|
Down
| 1 | | Optical illusion to disappoint the
thiristy desert traveller. (6) |
| 2 | | One of the colours of the visible
spectrum. (6) |
| 4 | | A concave lens always forms this
kind of image. (7) |
| 7 | | A line drawn perpendicular to a
plane. (6) |
|