Wave OpticsMedium
Question
Resultant amplitude in a positive zone plate is :
Options
A.R1 + R2 + R3 − R4 + ............
B.R1 + R3 + R5 + R7 + ............
C.R2 + R4 + R6 + R8 + ............
D.R1 − R3 + R5 − R7 + ............
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