full transcript

From the Ted Talk by Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet

Unscramble the Blue Letters

A solar cell absorbs light and converts it into electrical egenry. This is why we can use a solar cell to charge our mobile phone. But now we need to remember that the data is encoded in subtle changes of the brightness of the LED, so if the inoincmg light fluctuates, so does the energy harvested from the solar cell. This mnaes we have a pirpacnil mechanism in place to receive iiomrfntaon from the light and by the solar cell, because the ficttnuualos of the energy harvested correspond to the data transmitted.

Open Cloze

A solar cell absorbs light and converts it into electrical ______. This is why we can use a solar cell to charge our mobile phone. But now we need to remember that the data is encoded in subtle changes of the brightness of the LED, so if the ________ light fluctuates, so does the energy harvested from the solar cell. This _____ we have a _________ mechanism in place to receive ___________ from the light and by the solar cell, because the ____________ of the energy harvested correspond to the data transmitted.

Solution

  1. incoming
  2. information
  3. means
  4. principal
  5. energy
  6. fluctuations

Original Text

A solar cell absorbs light and converts it into electrical energy. This is why we can use a solar cell to charge our mobile phone. But now we need to remember that the data is encoded in subtle changes of the brightness of the LED, so if the incoming light fluctuates, so does the energy harvested from the solar cell. This means we have a principal mechanism in place to receive information from the light and by the solar cell, because the fluctuations of the energy harvested correspond to the data transmitted.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
solar cell 15
solar cells 5
led lamp 4
energy harvested 3
cells integrated 3
existing infrastructure 2
energy harvesting 2

ngrams of length 3

collocation frequency
solar cells integrated 3

Important Words

  1. absorbs
  2. brightness
  3. cell
  4. charge
  5. converts
  6. correspond
  7. data
  8. electrical
  9. encoded
  10. energy
  11. fluctuates
  12. fluctuations
  13. harvested
  14. incoming
  15. information
  16. led
  17. light
  18. means
  19. mechanism
  20. mobile
  21. phone
  22. place
  23. principal
  24. receive
  25. remember
  26. solar
  27. subtle
  28. transmitted