Please helppp none of the other answers were correct on acellus and I cannot solve it :((( 580 nm light shines on a double slit
with d = 0.000125 m. What is the
angle of the second bright
interference maximum (m = 2)?
(Remember, nano means 10-9.)
(Unit = deg)

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=