In the two-slit interference experiment of Figure, the slit widths are each 12.0 m , their separation is 24.0 m , the wavelength

In the two-slit interference experiment of Figure, the slit widths are each 12.0 µm, their separation is 24.0 µm, the wavelength is 600 nm, and the viewing screen is at a distance of 4.00 m. Let I_p represent the intensity at point P on the screen, at height y = 70.0 cm.

(a) What is the ratio of I_p to the intensity 1_m at the center of the pattern?

(b) Determine where P is in the two-slit interference pattern by giving the maximum or minimum on which it lies or the maximum and minimum between which it lies. 

(c) In the same way, for the diffraction that occurs, determine where point P is in the diffraction pattern.

Incident wavc S2 Path length difference AL (a) B