Textbook ExpertVerified Tutor
17 Nov 2021
Given information
Given Data :
The wavelength of the light passes through two slits :
Distance between the slits
The order of the interference
Distance from the slit to the screen
Separation of the two fringes on the 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.
Consider the figure to find the angle between the fringes as shown below :
Here
is the distance from the slit to the screen
is the distance between the fringes on the screen
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