In a Young's double slit experiment, the slit separation d is 0.3 mm and the screen distance D is 1 m. A parallel beam of light of wavelength 600 nm is incident on the slits at angle  as shown in figure. On the screen, the point O is equidistant from the slits and distance PO is 11.0 mm. Which of the following statement(s) is/are correct ?

Options

A. Fringe spacing depends on `alpha`
B. For `alpha = 0`, there will be constructive interference at point P
C. For `alpha = (0.36)/(pi)` degree , there will be destructive interference at point P.
D. For `alpha = (0.36)/(pi)` degree , there will be destructive interference at point O.

Answer

C