1. What is Planck’s constant value?

2. Does the LED work in the forward bias or the reverse bias?

3. What is the green color wavelength range?

4. Semiconductor Material name that shows the optical property?

5. What is the blue color wavelength?

6. Can we achieve the population inversion process in LED too?

7. What is the Red Color wavelength range?

8. To determine Planck’s Constant, we equate two different energies. The name of these two are;

9. Which material do we use an LED?

10. In a semiconductor diode (as per V-I Characteristics) the current doesn’t flow in the beginning. But at a certain value of the potential, it appears. What has known as the name of this potential?

11. Who discovered that radiation is in a discrete form of energy?

12. Why does the Blue color LED stopping potential is greater than the Red color LED?

13. How photon emits in the LEDs?

14. How are photons emitted from the LED and from which section of the LED?

15. Why do not LED starts to glow immediately when you provide biasing to that?