Viva Questions Determine the wavelength of the laser light by diffraction grating


Practice Quiz (Viva Questions)

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Viva Questions Determine the wavelength of the laser light by diffraction grating and demonstration.

1. What is Interference?

 
 
 
 

2. What is full form of the LASER?

 
 
 
 

3. What is the condition for constructive interference?

 
 
 
 

4. Does diffracted Waves can interfere?

 
 
 
 

5. What is grating Element?

 
 
 
 

6. What is spontaneous and stimulated emission process?

 
 
 
 

7. What is diffraction grating?

 
 
 
 

8. What are the Laser light characteristics ?

 
 
 
 

9. What is population Inversion?

 
 
 
 

10. What is the standard value of Red Color wavelength in He-Ne gas LASER?

 

 
 
 
 

11. Why do you use n lembda= d sin theta formula? What is the origin to derive this formula for this experiment?

 

 
 
 
 

12. How to find the grating element of a given diffraction grating having 1500 Lines Per Inch (LPI)?

 
 
 
 

13. What is diffraction?

 
 
 
 

14. What is the formula for to find the percentage error?

Observed value=A

Standard value=B

  1. Error = \frac{A-B}{B}\times 100
  2. Error = \frac{A-B}{A}\times 100
  3. Error = \frac{A-B}{2B}\times 100
  4. Error = \frac{2A-B}{B}\times 100

 

 
 
 
 


 


Video Demonstration of the Experiment


[embedyt] https://www.youtube.com/watch?v=Lf2Kk9fP4s8[/embedyt]

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Dr Sushil Kumar

Dr. Sushil Kumar, a physicist, an eminent researcher and a teacher for the benefit of students and fellow physicists alike. Apni Physics is an effort to create a better platform and also to help the students to be able to have content at their hands whenever they want, online. Dr. Sushil continues to upload his lectures and post articles about latest researches in physics, academic, physics education, and also lessons about daily life and how physics define every aspect of our everyday movement and life.

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