Does light travel forever?

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Tags

1. #however
2. #space
3. #within
4. #require
5. #matter
6. #empty
7. #smaller
8. #vacuum
9. #waves
10. #dissipate
11. #water
12. #travel
13. #medium
14. #travels
15. #light
16. #contrast
17. #materials
18. #glass
19. #because
20. #interacting
21. #through
22. #anything