In Young's double-slit experiment, the distance between the slits is kept about the size of the wavelength of the light, A. Why? Justify your statement(s) using mathematical expressions and physical analyses. Two slits separated by 0.250mm produce an interference pattern in which the fifth dark fringe is located a 12.8cm above the center of the screen. Determine the distance between the screen and the double-slit. What are the three (3) criteria of a monochromatic light? If the different Young's double-slit experiment have the slit separation ratio of 5:1, obtain the ratio of the intensity of maxima and minima in the interference pattern. Question 2: In Young's double-slit experiment, the wavelength of the monochromatic light is X. The intensity of light at point P on the screen when the path difference is 5X is given by Io. What is the intensity when the path difference is 10X?