Information and IdeasVery hardDetail about how a light is powered today
Information and Ideas practice question
The lighthouse's light was produced first by burning whale oil, then by paraffin, then by electricity, and since 2001 by a solar panel that charges a battery through the day. The lamp itself has shrunk from a brass burner the size of a barrel to a unit no larger than a torch, but its beam still reaches twenty miles.
According to the text, how is the lighthouse's light powered today?
- A. By a battery charged by a solar panel.Correct
- B. By paraffin.
- C. By whale oil.
- D. By a brass burner.
Answer: A. By a battery charged by a solar panel.
Since 2001, solar.
Why the other answers are wrong
- B. By paraffin.
- An earlier stage.
- C. By whale oil.
- The first stage.
- D. By a brass burner.
- The old lamp, now replaced.
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