Across
- 4. bluewaves
- 7. blackbody
- 9. redwaves
- 12. wavelength
- 15. doppperlereff
- 16. gammmarays
- 17. Electromagneticspectrum
- 19. frequency
Down
- 1. Microwaves
- 2. xrays
- 3. Radiowaves
- 5. infraredastronomy
- 6. absorptionspectrum
- 8. Visiblespectrum
- 10. ultravioletradiation
- 11. photon
- 13. emissionline
- 14. Spectroscopy
- 18. Radiation