Question

Two coherent light waves each having intensities I_(0) interfering at a point in space where resulting intensity observed is I_(0)//2, the phase difference between the two waves at the point of interference can be :

Answer 1

Answer:

I=I1+I2+2I1I2cosϕ--------- (1)

Here, I1=I2=I and cos60o=21

  in (1), Resultant intensity, I= I+I+(2I×21)

     =3I