Part a a laser beam travels through empty space in the r-direction. n (a) it has an electric field component described by s-1)t. ey(r, t)- (730 n/c) sin [(9.9 x 10 ml) r - (3-0x 10 the and z components of the electric field are zero. for the magnetic field that is induced by, and induces, the electric field variations of this electromagnetic wave, specify everything that you can about ts (i) direction, (ii) field strength, and bstanbronanod (iii) timing. (b) the laser beam has an intensity of 707 w/m2 when it is incident on an ideal polarising filter. this polarising filter (p1) has its transmission axis in the y-direction. after that is a second polarising filter (p2) with its transmission axis at 20° to the first. () what is the intensity of the light after travelling through p1, and through p2? (ii) how would your answer be different if the incident light source was randomly po- larised (but at the same intensity as the laser)? part b (advanced) two polarising filters can be arranged to block any incident light from being transmitted. a third polarising filter placed in between the two original filters can allow the combination of three filters to transmit some light explain these phenomena. make use of diagrams to illustrate the relative orientations of the transmission axes of the filters, and mathematical equations to support your reasoning.