Light of a certain wavelength passes through a pair of double slits with separation
18.00 micrometers (um) and falls on a
screen. If the angle between the center and
1st interference maximum is 1.500°, what is
the wavelength in nanometers (nm)?
[?] nm

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.