Watch the video and answer the following questions:
6. What is the optical fiber called by the speaker?
7. What analogy is used to simplify the idea of an optical fibre transmission?
8. What historical event is mentioned in the track?
9. What does the speaker demonstrate on a diagram?
10. How many elements are shown on the diagram? What are they?
11. What is the purpose of each element?
12. Watch and listen to the following part of the video track and fill in the gaps in the following text with the words you hear:
00:35 – 01:24
| So, put yourself in a (1) __________ World War II setting. You are on a (2) __________ . It’s (3) __________ , and it’s (4) __________ , and it’s (5) __________ . And you want to (6) __________ another ship, so you can, perhaps, ask for some (7) __________ , using your telescope. So, you search for a ship, you try to find one … and… There! You find a ship! Immediately you (8) __________ the captain that ship is nearby. The (9) __________ sends a (10) __________ to the (11) __________ to (12) __________ to the other ship. The sailor runs up to the deck and transmits the (13) __________ using a handy flashlight into a Morse code. So, the sailor on the other ship (14) __________ the Morse code (15) __________ and (16) __________ it to the captain of the other ship. And they go back and forth. So, you get the point! |
13. What does the word “flashlight” mean?