Across
- 2. curving outward.
- 6. picture from mirror.
- 9. light beside purple light .
- 10. light beside red light.
- 12. light spread out or bend when it pass through a slit or an obstacle.
- 13. light pass through different medium and bend
Down
- 1. light hit a surface and return back
- 3. not real.
- 4. curving inward.
- 5. light through a prism into 7 coulors
- 7. wave from the Sun conclude 7 waves .
- 8. heating foods
- 11. transfer signal of cell phone.