2.9. Light Emitting Diode (LED)

Try these first

1. 1.

   What is an LED?

   Hint

   Think about what happens when you connect it to a power source.

2. 2.

   Name one material used in the construction of LEDs.

   Hint

   Consider the name of the compound mentioned.

3. 3.

   What does LED stand for?

   • Light Emitting Diode
   • Light Emitting Device
   • Laser Emitting Diode

   Hint

   Consider what role illumination plays in the acronym.

4. 4.

   LEDs can work in reverse bias.

   • True
   • False

   Hint

   Think about how other diodes behave under reverse bias.

5. 5.

   Describe a scenario in which LEDs can replace traditional incandescent bulbs, specifying their advantages.

   Hint

   Consider factors like energy savings and replacement frequency.

6. 6.

   If an LED emits red light, what can you infer about the energy band gap of the semiconductor used? Discuss its implications for the LED's application range.

   Hint

   Think about how band gap energy relates to the color of light produced.