CSIR UGC NET Physical Science June 2019 EM field

the questions goes like this

Two coherent plane electromagnetic waves of wavelength 0.5 micrometre ( both have the same amplitude and are linearly polarized along the Z direction) fall on the y = 0 plane their vector K1 and K2 are as shown in the figure. if the angle theta is 30 degree the fringe spacing of the interference pattern produced on the plane is ….

Solution is below

The Slide PDF can be found here :

Csr ugc net phy june19 physics q(14 of 55) solution from bkacademy