| Answer | Crossword Clue |
|---|---|
| HEATLAMP | Infrared device |
| BLACKLIGHT | Infrared beam |
| RAYS | Infrared and gamma |
| THERMALIMAGING | One use of infrared radiation |
| LASERTAG | Team game with infrared-sensitive targets |
| POLARBEARS | Animals that are nearly invisible to infrared detectors |
| ETA | ... Carinae (the brightest infrared object in the night sky) |
