Across
- 5. Waves of energy that travel through space as packets called 'photons'
- 7. A shape of lens or mirror where the middle is thinner than the edges
- 8. The smallest packet of energy that light can travel as
- 10. A band of colors such as a rainbow
- 11. When a light reflects off a mirror
- 12. A region in space that the Sun passes through
Down
- 1. Astrology signs are based on these star formations
- 2. A field of physics that studies the behavior of light
- 3. An instrument astronomers use to observe the night sky
- 4. A shape of lens or mirror where the middle is thicker than the edges
- 6. Three laws that dictate how objects in space move
- 8. A method of calculating distance to far away objects
- 9. When light bends through a lens