light puzzle

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Across
  1. 4. when lights goes in an objest as energy
  2. 9. when lights pass through an object
  3. 11. object that makes their own energy
  4. 13. when energy transfer without matter needed
  5. 17. something that exploded during the middle of he class
  6. 18. energy that got generated by electricity
  7. 19. lights thats been generated none naturally
  8. 21. one of the most important scientist and gave the thought of light is a particle
Down
  1. 1. object that are only reflecting light by luminouse object
  2. 2. someone who is very wise and he is a level 2 math teacher
  3. 3. Energy energy form by atom particles
  4. 5. when lights fully goes through an object
  5. 6. someone who help gaving birth to you
  6. 7. something thats on your arm who bryson have a massive one
  7. 8. light thats been generated naturally
  8. 10. someone who gave birth to you
  9. 12. when none light pass through an object
  10. 14. a very wise god who always flys around(he's looking at you!)
  11. 15. energy that travles without matter need
  12. 16. when lights bounce off an object
  13. 20. when only some lights pass through an object