| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Reflecting telescope | No definition provided | Christopher Rauch | 2023.12.01 |
| Reflecting telescopes | A telescope in which the image is produced by reflection of light by a concave mirror. | Ryan McGranaghan | 2023.04.16 |
| reflection | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Reflection nebulae | A type of nebula that is visible from its reflection of starlight. Bright stars near reflection nebulae emit light into the region that is reflected by the large amount of dust there. The size of the dust grains causes blue light to be reflected more efficiently than red light, so these reflection nebulae frequently appear blue in color. | Ryan McGranaghan | 2023.04.16 |
| Reflection (Optics) | No definition provided | Christopher Rauch | 2023.12.01 |
| Reflections | No definition provided | Christopher Rauch | 2023.12.01 |
| reflectivity | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Reflectivity | Ratio of the energy reflected by a given surface to that incident upon it. | GCW Glossary | 2023.03.27 |
| Reflectometer | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Reflectors and feeds | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Reflex action | No definition provided | Christopher Rauch | 2023.12.01 |
| Reflexes | No definition provided | Christopher Rauch | 2023.12.01 |
| reforestation | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Reforestation | No definition provided | Christopher Rauch | 2023.12.01 |
| reformat | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Reformation | No definition provided | Christopher Rauch | 2023.12.01 |
| Reformation--Bibl | No definition provided | Christopher Rauch | 2023.12.01 |
| Reformatories | No definition provided | Christopher Rauch | 2023.12.01 |
| reformatted | No definition provided | Ryan McGranaghan | 2023.04.16 |
| reformatting | No definition provided | Ryan McGranaghan | 2023.04.16 |