full transcript

From the Ted Talk by Joy Lin: If superpowers were real Invisibility

Unscramble the Blue Letters

Wouldn't it be graet if we could be invisible? Ha, right? I mean, we could spy on people without being noticed and do whatever we want without being held rsspoeilbne. Now, magicians have fiegrud out how to utilize full-sized mirrors to bend light in order to create disappearing illusions. Scientists have craeetd metamaterials to guide rays of light around tiny, two-dimensional obejcts. Cameras can also film what is behind you and project the image so you appear invisible from the front. However, none of these options can make an object as large as a person appear invisible for all angles and distances while its moving. But if you are truly invisible, as in from within, here are a few problems you may not have thought about before. To move around undetected by other people, you would have to be totally naked. Even if it's freezing outside! You can't carry anything, including your wallet and keys, otherwise ppolee would just see your wallet and keys floating around. Drivers and people on the sertet can't see you either, therefore they can and will run into you at some pinot. Oh, and you better not wear any perfume or make any noise breathing, otherwise they'll know you're there. And, just because you satrt off invisible, doesn't mean you'll stay that way. What if someone accidentally spills sdcoilng hot ceffoe on you? And what if it rains? But if you think only liquid can make you visible, you're wrong. Dust consists of dead skin cells from humans, soil particles, and fbiers from clothes made from cttoon and other materials. Dust sticks to the moisture on our skin when we sweat and the tiny hrias on our skin when we are dry. So, even if you are invisible, dust would still land on every part of you. We usually don't notice the dust on our skin because we can't see a thin layer of dust on top of our skin color. But, if you're iblsnviie, people would see a human-shaped blob of dust walking around with extremely dirty seols. Gross! What do you think the world looks like if you are invisible? Well, the asenwr is nothing. The reason you can't see in the dark is because there is no light. To see an apple, light has to hit the apple and rrtuen it to your eyes. Then, the retinas in your eyes catch the light reflection for your bairn to interpret into the igame of an apple. If you're invisible, then, by definition, light would travel through you or around you instead of bouncing off you for people to see. But that means that rniates in your eyes are not cathncig the light, either. Therefore, your brain has nothing to intreeprt into an image. Can you see your rteeifcoln without a mirror to stop the light? No. So, when you can't be seen by others, you also cannot see. Ouch! Now, have you given any thought as of whether the invisibility is permanent? If it is, how can you receive medical treatment from a dtcoor if you're injured? The doctor wouldn't know where to apply ointments or bedagans because they cannot aecscs your injury. For that matter, you can't see it either. I mean, what if you have an illness or an infection? How can the doctor diagnose you without being able to see the color change or inflammation? And what if everyone is permanently invisible? Well, think about how boring the world would be without seeing people on the setrets, on TV, or at home on your computer like right now. It's lonely being invisible. Now, which suprpweoer physics lesson will you explore next? Shifting body size and content, super seepd, flight, super sretntgh, immortality, and invisibility.

Open Cloze

Wouldn't it be _____ if we could be invisible? Ha, right? I mean, we could spy on people without being noticed and do whatever we want without being held ___________. Now, magicians have _______ out how to utilize full-sized mirrors to bend light in order to create disappearing illusions. Scientists have _______ metamaterials to guide rays of light around tiny, two-dimensional _______. Cameras can also film what is behind you and project the image so you appear invisible from the front. However, none of these options can make an object as large as a person appear invisible for all angles and distances while its moving. But if you are truly invisible, as in from within, here are a few problems you may not have thought about before. To move around undetected by other people, you would have to be totally naked. Even if it's freezing outside! You can't carry anything, including your wallet and keys, otherwise ______ would just see your wallet and keys floating around. Drivers and people on the ______ can't see you either, therefore they can and will run into you at some _____. Oh, and you better not wear any perfume or make any noise breathing, otherwise they'll know you're there. And, just because you _____ off invisible, doesn't mean you'll stay that way. What if someone accidentally spills ________ hot ______ on you? And what if it rains? But if you think only liquid can make you visible, you're wrong. Dust consists of dead skin cells from humans, soil particles, and ______ from clothes made from ______ and other materials. Dust sticks to the moisture on our skin when we sweat and the tiny _____ on our skin when we are dry. So, even if you are invisible, dust would still land on every part of you. We usually don't notice the dust on our skin because we can't see a thin layer of dust on top of our skin color. But, if you're _________, people would see a human-shaped blob of dust walking around with extremely dirty _____. Gross! What do you think the world looks like if you are invisible? Well, the ______ is nothing. The reason you can't see in the dark is because there is no light. To see an apple, light has to hit the apple and ______ it to your eyes. Then, the retinas in your eyes catch the light reflection for your _____ to interpret into the _____ of an apple. If you're invisible, then, by definition, light would travel through you or around you instead of bouncing off you for people to see. But that means that _______ in your eyes are not ________ the light, either. Therefore, your brain has nothing to _________ into an image. Can you see your __________ without a mirror to stop the light? No. So, when you can't be seen by others, you also cannot see. Ouch! Now, have you given any thought as of whether the invisibility is permanent? If it is, how can you receive medical treatment from a ______ if you're injured? The doctor wouldn't know where to apply ointments or ________ because they cannot ______ your injury. For that matter, you can't see it either. I mean, what if you have an illness or an infection? How can the doctor diagnose you without being able to see the color change or inflammation? And what if everyone is permanently invisible? Well, think about how boring the world would be without seeing people on the _______, on TV, or at home on your computer like right now. It's lonely being invisible. Now, which __________ physics lesson will you explore next? Shifting body size and content, super _____, flight, super ________, immortality, and invisibility.

Solution

  1. retinas
  2. scolding
  3. people
  4. streets
  5. soles
  6. catching
  7. coffee
  8. fibers
  9. reflection
  10. superpower
  11. created
  12. answer
  13. speed
  14. hairs
  15. image
  16. bandages
  17. doctor
  18. start
  19. interpret
  20. objects
  21. great
  22. figured
  23. responsible
  24. brain
  25. street
  26. access
  27. return
  28. point
  29. invisible
  30. strength
  31. cotton

Original Text

Wouldn't it be great if we could be invisible? Ha, right? I mean, we could spy on people without being noticed and do whatever we want without being held responsible. Now, magicians have figured out how to utilize full-sized mirrors to bend light in order to create disappearing illusions. Scientists have created metamaterials to guide rays of light around tiny, two-dimensional objects. Cameras can also film what is behind you and project the image so you appear invisible from the front. However, none of these options can make an object as large as a person appear invisible for all angles and distances while its moving. But if you are truly invisible, as in from within, here are a few problems you may not have thought about before. To move around undetected by other people, you would have to be totally naked. Even if it's freezing outside! You can't carry anything, including your wallet and keys, otherwise people would just see your wallet and keys floating around. Drivers and people on the street can't see you either, therefore they can and will run into you at some point. Oh, and you better not wear any perfume or make any noise breathing, otherwise they'll know you're there. And, just because you start off invisible, doesn't mean you'll stay that way. What if someone accidentally spills scolding hot coffee on you? And what if it rains? But if you think only liquid can make you visible, you're wrong. Dust consists of dead skin cells from humans, soil particles, and fibers from clothes made from cotton and other materials. Dust sticks to the moisture on our skin when we sweat and the tiny hairs on our skin when we are dry. So, even if you are invisible, dust would still land on every part of you. We usually don't notice the dust on our skin because we can't see a thin layer of dust on top of our skin color. But, if you're invisible, people would see a human-shaped blob of dust walking around with extremely dirty soles. Gross! What do you think the world looks like if you are invisible? Well, the answer is nothing. The reason you can't see in the dark is because there is no light. To see an apple, light has to hit the apple and return it to your eyes. Then, the retinas in your eyes catch the light reflection for your brain to interpret into the image of an apple. If you're invisible, then, by definition, light would travel through you or around you instead of bouncing off you for people to see. But that means that retinas in your eyes are not catching the light, either. Therefore, your brain has nothing to interpret into an image. Can you see your reflection without a mirror to stop the light? No. So, when you can't be seen by others, you also cannot see. Ouch! Now, have you given any thought as of whether the invisibility is permanent? If it is, how can you receive medical treatment from a doctor if you're injured? The doctor wouldn't know where to apply ointments or bandages because they cannot access your injury. For that matter, you can't see it either. I mean, what if you have an illness or an infection? How can the doctor diagnose you without being able to see the color change or inflammation? And what if everyone is permanently invisible? Well, think about how boring the world would be without seeing people on the streets, on TV, or at home on your computer like right now. It's lonely being invisible. Now, which superpower physics lesson will you explore next? Shifting body size and content, super speed, flight, super strength, immortality, and invisibility.

Frequently Occurring Word Combinations

Important Words

  1. access
  2. accidentally
  3. angles
  4. answer
  5. apple
  6. apply
  7. bandages
  8. bend
  9. blob
  10. body
  11. boring
  12. bouncing
  13. brain
  14. breathing
  15. cameras
  16. carry
  17. catch
  18. catching
  19. cells
  20. change
  21. clothes
  22. coffee
  23. color
  24. computer
  25. consists
  26. content
  27. cotton
  28. create
  29. created
  30. dark
  31. dead
  32. definition
  33. diagnose
  34. dirty
  35. disappearing
  36. distances
  37. doctor
  38. drivers
  39. dry
  40. dust
  41. explore
  42. extremely
  43. eyes
  44. fibers
  45. figured
  46. film
  47. flight
  48. floating
  49. freezing
  50. front
  51. great
  52. guide
  53. ha
  54. hairs
  55. held
  56. hit
  57. home
  58. hot
  59. humans
  60. illness
  61. illusions
  62. image
  63. immortality
  64. including
  65. infection
  66. inflammation
  67. injured
  68. injury
  69. interpret
  70. invisibility
  71. invisible
  72. keys
  73. land
  74. large
  75. layer
  76. lesson
  77. light
  78. liquid
  79. lonely
  80. magicians
  81. materials
  82. matter
  83. means
  84. medical
  85. metamaterials
  86. mirror
  87. mirrors
  88. moisture
  89. move
  90. moving
  91. naked
  92. noise
  93. notice
  94. noticed
  95. object
  96. objects
  97. ointments
  98. options
  99. order
  100. part
  101. particles
  102. people
  103. perfume
  104. permanent
  105. permanently
  106. person
  107. physics
  108. point
  109. problems
  110. project
  111. rains
  112. rays
  113. reason
  114. receive
  115. reflection
  116. responsible
  117. retinas
  118. return
  119. run
  120. scientists
  121. scolding
  122. shifting
  123. size
  124. skin
  125. soil
  126. soles
  127. speed
  128. spills
  129. spy
  130. start
  131. stay
  132. sticks
  133. stop
  134. street
  135. streets
  136. strength
  137. super
  138. superpower
  139. sweat
  140. thin
  141. thought
  142. tiny
  143. top
  144. totally
  145. travel
  146. treatment
  147. tv
  148. undetected
  149. utilize
  150. visible
  151. walking
  152. wallet
  153. wear
  154. world
  155. wrong