An electric dipole consists of charges +q_1 and -q_1 separated by 2 mm. find the magnitude of the electric dipole moment if q_1 = 5 pc? find the magnitude of the electric field due to the dipole at point p along the dipole axis at distance z = 5 m, where z is the distance from the center of the dipole to point p? draw the system, the dipole moment and the location of point p

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?