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In double slit experiment SS_2 is greater than SS_1 by 0.25lamda. Calculatethe path difference between two interfering beam from S_1 and S_2 forminima and maxima on the point P as shown in figure.

Answer»

Solution :PATH DIFFERENCE
`(SS_2+S_2P)-(SS_1+S_1P)=(SS_2-SS_1)+(SS_2P-S_1P)`
`=(0.25 LAMDA +S_2P-S_1P)`
For maxima path difference `=n lamda` ,
So, `S_2P-S_1P= n lamda-0.25 lamda=(n-0.25) lamda`
For minima path difference =`(2n+1) lamda/2`
So, `S_2P-S_1P=(2n+0.5)lamda//2`


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