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CBSE Class 12-science Answered

Explain diffraction of light due to single slit ,derive secondary Maxima and minima?
Asked by vanshrathod71 | 30 Jan, 2019, 12:38: PM
Expert Answer
Diffraction is the phenomenon of bending of light around corners of an obstacle in the path of light.
 
Condition: Diffraction of light takes place if the size of the obstacle is comparable to the wavelength of the light. 
 
The condition for secondary maxima is: begin mathsize 12px style asinθ equals nλ over 2 end style
The condition for secondary maxima is: begin mathsize 12px style asinθ equals nλ end style
Where, n = 1, 2, 3, ...
 
In single slit diffraction experiment,
Intensity is proportional to the square of the slit width. Thus, when the width of the slit is made double the original width, intensity will get four times of its original value.

 
 
The intensity distribution curve is shown below.
 
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