Assignment

1. What is the value of knee voltage for a Yellow LED light?
2. Calculate the value of Planck’s constant for Blue LED, using its knee voltage.
3. Calculate the wavelength of an IR LED by comparing it with a Red LED at their corresponding knee voltages.
4. Calculate the wavelength of an IR LED by comparing it with a Green LED at their corresponding knee voltages.
5. Calculate the wavelength of IR LED by drawing a graph between voltage and wavelength.
6. What happens when an LED is directly connected to a power supply? Which is the most suitable resistor value if a power supply of 0–12 V is used?
7. Which LED has the largest energy gap?