Refractive Indexes and Invisibility (A real-life magic trick)

When light refracts from two different substances with the same index of refraction, the materials cannot be distinguished from one another. Here, Pyrex and vegetable oil have the same index of refraction so that the test tube appears invisible in vegetable oil. The light isn’t bouncing off  off of the pyrex tube, just travelling straight through. 

However, water and pyrex have a very different refractive index. The light travelling through the water refracts off the pyrex and reflects back in to your eye, so it does not appear invisible. 

When you see the pyrex test tube under the oil, you are actually just viewing the air inside it before it becomes filled as the pyrex itself is invisible.

source

  1. lovergrimmjow reblogged this from coolsciencegifs
  2. chimerical-charisma reblogged this from coolsciencegifs
  3. juicyolive1988 reblogged this from coolsciencegifs
  4. kd321 reblogged this from coolsciencegifs
  5. youngcraiger reblogged this from coolsciencegifs
  6. nekcihc-yerewolf reblogged this from taterclaw
  7. fog-of-lost-souls reblogged this from condwiramurs
  8. condwiramurs reblogged this from vixensregretnothing
  9. vixensregretnothing reblogged this from taterclaw
  10. taterclaw reblogged this from breakingdownchemistry
  11. sumlatroetnauta reblogged this from coolsciencegifs
  12. wall-to-wall-shezza reblogged this from megthenerd
  13. stickfigurefairytales reblogged this from monstersqueen
  14. monstersqueen reblogged this from imamathlover
  15. theaffluenza reblogged this from imamathlover
  16. imamathlover reblogged this from jryanm
  17. jryanm reblogged this from somuchscience
  18. crashnburn157 reblogged this from iaskforpleasurefirst
  19. iaskforpleasurefirst reblogged this from meohellokitty and added:
    YO WHAT THE FUCK
  20. meohellokitty reblogged this from talkchemistrytome
  21. sendmeonatrip reblogged this from coolsciencegifs
  22. megthenerd reblogged this from coolsciencegifs
blog comments powered by Disqus