Assignment 2 : 10%; not less than 500 words
Report topic: Blue light-emitting diode (blue LED)
Your report includes the following information:
1. Importance of the blue LED,
2. History of light from Kerosene lamps, Incandescent lights, Fluorescent
lights to LED lights (include -- what they are, who invented, how each
type of lights emits)
3. Compare the efficiency of the incandescent bulbs, fluorescent bulbs
and LED lights,
4. In what ways the LED lights are used,
5. Explain why the LED lights are beneficial to the countries with
insufficient electricity.