1.

In double slit experiment, SS_2 is greater than SS_1 by 0.25 lamda . Calculate the path difference between two interfering beams from S_1 and S_2 for minima and maxima on the screen.

Answer»

SOLUTION :PATH difference between interfering waves
`(SS_1 + S_2P) - (SS_1 + S_1P)`
` = (S_2P - S_1 P) + (SS_2 - SS_1)`
` d/D lamda + 0.25 lamda`
For MAXIMUM
` d/D y + 0.25 lamda = N lamda`
or` d/D y = ( n- 0.25) lamda`
for minimum` d/D y + 0.25 lamda`
` (2n +1 ) lamda/2`
` d/D y = (2n +1) lamda/2 - 2 xx 0.25 xx lamda/2`
`d/D y = (2n + 0.5) lamda/2`


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