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Starter Activity

Visit the BBC Technology website below.


Watch the presentation on the history of the LED.

Answer the questions that follow.




  1. What colour were the very first LEDs designed by Prof Holonyak?

  2. What is unusual about a semiconductor compared to copper wire?

  3. What is the energy change in an LED?

  4. How much did the original LED cost in 1962?

  5. Give one advantage of using LED lighting for car brake lights.

  6. Give on advantage of using LED lighting for street lights.

Questions as Word document