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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?

  1. A. By a battery charged by a solar panel.Correct
  2. B. By paraffin.
  3. C. By whale oil.
  4. 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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