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At first minimum adjacent to the centraĺ maximum of a single slit of diffraction pattern the phase difference between huygen's wavelet from the edge of the slit and the wavelet from the mid point of the slit is 1)pi/8 2)pi/4 3)pi/2 4)pi

At first minimum adjacent to the centraĺ maximum of a single slit of diffraction pattern the phase difference between huygen's wavelet from the edge of the slit and the wavelet from the mid point  of the slit is
1)pi/8 
2)pi/4
3)pi/2
4)pi
 

Grade:12th pass

1 Answers

Vikas TU
14149 Points
5 years ago
At the first minima
=>   a sinѲ = nƛ
=>  a sinѲ = ƛ
Then Phase diference =dx1/wavelength x 2pi
                            = a/2 sinѲ/ ƛ x2pi
                            = ƛ/2/ ƛ * 2 pi
                               = pi
 
 
 
 

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