In a YDSE setup, the graph of phase difference φ versus angular position θ is shown. Choose the correct statements.

Select all that apply

• Option A

  The distance S1S2 = 2λ

• Option B

  There are a total of 4 minima on the screen π

• Option C

  The first maxima above the centre is at θ = 4 π

• Option D

  At θ = , intensity is maximum 6