How a single LED emits different Colours?

Related questions

1. Is lead or led correct?
2. What is RGB LED?
3. Why are LED lights better?
4. What causes the difference in color between LEDs?
5. Why do you need a resistor with an LED?
6. What's wrong with LED lights?
7. How do you connect LED lights?
8. Why are LEDs better?
9. Does every LED need a resistor?
10. Do 12v LEDs need resistors?

Tags

1. #white
2. #material
3. #element
4. #lighting
5. #alloys
6. #types
7. #determines
8. #color
9. #orange
10. #presently
11. #conducting
12. #yellow
13. #nitride
14. #aluminum
15. #indium
16. #gallium
17. #phosphide
18. #systems
19. #green