Plancks Quiz

Last updated on Tuesday, November 22nd, 2022

Questions in this quiz are related to Planck’s constant experiment. These viva questions will help you to understand the topic from different angles.

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1. Semiconductor Material name that shows the optical property?

 
 
 
 

2. Which material do we use an LED?

 
 
 
 

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

 
 
 

4. What is the Red Color wavelength range?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

7. What is the green color wavelength range?

 
 
 
 

8. What is Planck’s constant value?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 

12. What is the blue color wavelength?

 
 
 
 

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

 
 
 
 

14. 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?

 
 
 

15. How photon emits in the LEDs?

 
 
 

Question 1 of 15

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