An electromagnetic wave with frequency 4.05 x 1014 Hz travels through vacuum in the positive direction of an x axis. The wave has its electric field directed parallel to the y axis, with amplitude Em. At time t = 0, the electric field at point P on the x axis has a value of +Em/ 7 and is decreasing with time. What is the distance along the x axis from point P to the first point with E = 0 if we search in (a) the negative direction and (b) the positive direction of the x axis? Assume that the speed of light is 2.998×10® m/s. (a) Number i Units (b) Number i Units

An electromagnetic wave with frequency 4.05 x 1014 Hz travels through vacuum in the positive direction of an x axis. The wave has its electric field directed parallel to the y axis, with amplitude Em. At time t = 0, the electric field at point P on the x axis has a value of +Em/ 7 and is decreasing with time. What is the distance along the x axis from point P to the first point with E = 0 if we search in (a) the negative direction and (b) the positive direction of the x axis? Assume that the speed of light is 2.998×10® m/s. (a) Number i Units (b) Number i Units