Light travels at a speed of close to 3 x 10^5 km/s in vacuum. given that it takes light 8 min and 19 s to travel the distance from the center of the earth to the center of the sun, how far away is the sun from the earth? (astronomers use this as a "distance unit" called 1 astronomical unit or 1 au)

Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction