Two slits spaced 0.130 mm apart are placed 90.0 cm from a screen and illuminated by coherent light with wavelength 550 nm. The intensity at the center of the central maximum is 4.30×10-6 W/m2. A) What is the distance on the screen between the third bright fringe and the sixth dark fringe? B) What is the intensity at a point midway between the first bright fringe and the second dark fringe? C) Draw a picture of the situation showing parts (a) and (b).

Two slits spaced 0.130 mm apart are placed 90.0 cm from a screen and illuminated by coherent light with wavelength 550 nm. The intensity at the center of the central maximum is 4.30×10-6 W/m2. A) What is the distance on the screen between the third bright fringe and the sixth dark fringe? B) What is the intensity at a point midway between the first bright fringe and the second dark fringe? C) Draw a picture of the situation showing parts (a) and (b).