Two very narrow, parallel slits separated by a distance of 1.4 x 10-5m are illuminated by coherent, monochromatic light of wavelength 7.0 x 10-7m. a describe what is meant by coherent and monochromatic light. b draw a graph to show the intensity of light observed on a screen far from the slits. c by drawing another graph on the same axes, illustrate the effect on the intensity distribution of increasing the width of the slits to 2.8 x 10-5m.

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r