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| Term | Definition |
|---|---|
| constellations | A pattern of stars in the sky |
| electromagnetic radiation | Energy that travels through space in the form of waves |
| visible light | Electromagnetic radiation that can be seen with the unaided eye |
| Electromagnetic Spectrum | the entire frequency range of electromagnetic waves |
| Wavelength | The distance between the crest of one wave and the crest of the next |
| frequency | The number of waves produced in a given amount of time |