Q1. If 730 nm and 675 nm light passes throughout two slits 0.63 mm apart, how far apart are the second-order fringes for these two wavelengths on a screen 1.2 m away?
Q2. A positive charge of q = 3.5 µC is pulled on by two negative charges. One, -2.0 µC, is 0.050 m to the north and the other, -4.0 µC, is d = 0.029 m to the south. What total force is exerted on the positive charge?