full transcript

From the Ted Talk by Patricia Burchat: Shedding light on dark matter

Unscramble the Blue Letters

Now, you can do an experiment tonight over the reception, OK, to figrue out what that image will look like. Because it turns out that there is a kind of lens that we can devise, that has the right shape to produce this kind of effect. We call this gntiraitovaal lensing. And so, this is your instrument, OK. (lugehtar). But ignore the top part. It's the base that I want you to concentrate, OK. So, actually, at home, whenever we break a wineglass, I save the bottom, take it over to the mnahice shop. We shave it off, and I have a little gravitational lens, OK. So it's got the right shape to produce the lsienng. And so the next thing you need to do in your epmnieerxt is grab a napkin. I grabbed a piece of graph paper — I'm a physicist. (Laughter) So, a napkin. Draw a little mdoel galaxy in the middle. And now put the lens over the galaxy, and what you'll find is that you'll see a ring, an eesniitn ring. Now, move the base off to the side, and the ring will split up into arcs, OK. And you can put it on top of any image. On the graph paper, you can see how all the lnies on the gaprh paper have been dittsreod. And again, this is a kind of an acatrcue model of what happens with the gravitational lensing.

Open Cloze

Now, you can do an experiment tonight over the reception, OK, to ______ out what that image will look like. Because it turns out that there is a kind of lens that we can devise, that has the right shape to produce this kind of effect. We call this _____________ lensing. And so, this is your instrument, OK. (________). But ignore the top part. It's the base that I want you to concentrate, OK. So, actually, at home, whenever we break a wineglass, I save the bottom, take it over to the _______ shop. We shave it off, and I have a little gravitational lens, OK. So it's got the right shape to produce the _______. And so the next thing you need to do in your __________ is grab a napkin. I grabbed a piece of graph paper — I'm a physicist. (Laughter) So, a napkin. Draw a little _____ galaxy in the middle. And now put the lens over the galaxy, and what you'll find is that you'll see a ring, an ________ ring. Now, move the base off to the side, and the ring will split up into arcs, OK. And you can put it on top of any image. On the graph paper, you can see how all the _____ on the _____ paper have been _________. And again, this is a kind of an ________ model of what happens with the gravitational lensing.

Solution

  1. model
  2. laughter
  3. distorted
  4. lensing
  5. lines
  6. machine
  7. graph
  8. figure
  9. gravitational
  10. experiment
  11. einstein
  12. accurate

Original Text

Now, you can do an experiment tonight over the reception, OK, to figure out what that image will look like. Because it turns out that there is a kind of lens that we can devise, that has the right shape to produce this kind of effect. We call this gravitational lensing. And so, this is your instrument, OK. (Laughter). But ignore the top part. It's the base that I want you to concentrate, OK. So, actually, at home, whenever we break a wineglass, I save the bottom, take it over to the machine shop. We shave it off, and I have a little gravitational lens, OK. So it's got the right shape to produce the lensing. And so the next thing you need to do in your experiment is grab a napkin. I grabbed a piece of graph paper — I'm a physicist. (Laughter) So, a napkin. Draw a little model galaxy in the middle. And now put the lens over the galaxy, and what you'll find is that you'll see a ring, an Einstein ring. Now, move the base off to the side, and the ring will split up into arcs, OK. And you can put it on top of any image. On the graph paper, you can see how all the lines on the graph paper have been distorted. And again, this is a kind of an accurate model of what happens with the gravitational lensing.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
dark matter 24
dark energy 7
big questions 3
gravitational effects 3
gravitational lensing 3
largest scale 2
ordinary matter 2
electromagnetic spectrum 2
einstein predicted 2
einstein ring 2
graph paper 2
hubble space 2
space telescope 2
gravitationally attracting 2
stephen hawking 2
billion years 2
gravitational attraction 2
mathematically consistent 2
large hadron 2

ngrams of length 3

collocation frequency
hubble space telescope 2

Important Words

  1. accurate
  2. arcs
  3. base
  4. bottom
  5. break
  6. call
  7. concentrate
  8. devise
  9. distorted
  10. draw
  11. effect
  12. einstein
  13. experiment
  14. figure
  15. find
  16. galaxy
  17. grab
  18. grabbed
  19. graph
  20. gravitational
  21. home
  22. ignore
  23. image
  24. instrument
  25. kind
  26. laughter
  27. lens
  28. lensing
  29. lines
  30. machine
  31. middle
  32. model
  33. move
  34. napkin
  35. paper
  36. part
  37. physicist
  38. piece
  39. produce
  40. put
  41. reception
  42. ring
  43. save
  44. shape
  45. shave
  46. shop
  47. side
  48. split
  49. tonight
  50. top
  51. turns
  52. wineglass