1. What is Light Emitting Diode (LED)?
2. What are the common uses of single-color LEDs for several decades?
3. Why was Nick Holonyak Jr. regarded as “Father of the LED”?
4. Why was the invention of the blue LED so important, who invented?
5. How light is created in an incandescent lightbulb, a fluorescent lightbulb and a LED lightbulb?
6. Compare the advantages of the LED lighting over incandescent and fluorescent lighting?
7. Why are the LED lights beneficial to the countries with insufficient electricity.