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Textbook Expert
Textbook ExpertVerified Tutor
20 Nov 2021

Given information

Given Data :
 
In a double-slit experiment, the third-order maximum for light :
 
 
Wavelength of light  
 
Distance between the slits on a screen  
  
Order of a fringe    
 
The distance between the central bright spot on a screen   
 
Distance between the two slits  
 
 
For the second-order maximum for light :
 
 
Wavelength of light  
  
Order of a fringe   
 
The distance between the central bright spot on a screen  
 

Step-by-step explanation

Step 1.
To obtain constructive interference for a double-slit :
 
 
 
where 
 
  is the distance between the slits
 
  is the angle relative to the incident direction
 
and   is the order of the interference.
 
 
 

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