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Across 3. Named for the legendary sister of King Arthur 4. Narrow whitish ring around the sun 6. Light rays of different frequencies meet with some being 'canceled' out 7. Slight bending of light as it passes sharp edges 9. Optical effect caused by refraction of an object's image 10. Mirage in which object size is magnified 12. Separation of light into its component colors 13. Bright, whitish disk associated with the Moon 14. "Mock suns" 15. Rings of colored light appearing around shadow of airplane on clouds below

Down 1. Mirage allowing objects to be seen that are below the horizon 2. Angle of incidence equals angle of reflection 5. Bending of light as it passes from one medium to another 8. Vertical shafts of light caused by reflection from ice crystals 11. Arch-shaped array of colors that trail across segment of the sky