Solve the following question given below:
Question: Parallel rays of monochromatic light with wavelength 585nm illuminate two identical slits and produce an interference pattern on a screen that is 75.0cm from the slits. The centers of the slits are 0.640 mm apart and the width of each slit is 0.434 mm.
A- If the intensity at the center of the central maximum is 3.50×10?4W/m2 , what is the intensity at a point on the screen that is 0.770mm from the center of the central maximum?
Please explain clearly with details so that I can follow and express your answer to three significant figures and include the appropriate units. Thanks.