Question 9 and 10..

Question 9 and 10.. f he Lensitics of visibilityof fringes will the waves a' and z O Sin then the masimum intensity will be (assume K z I)

9) The correct option will be option b 2p1+p
  as Visibility ,v = IMAX-IMINIMAX+IMIN                  = 2I1I2(I1+I2)=2I1I2I1I2+1                  = 2PP+1

CORRECT ANSWER IS OPTION B

And kindly ask question 10 in another thread.
Thank you

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