Iwant to simulate a fiber modulator in lumerical mode solution by eigensolver but the results depend on simulation region size. what is the simulation region size at metal boundary condition in lumerical mode solution?
furthermore after eigenmode analysis in mode solution, i can't recognize te and tm mode in mode list. is the first te mode and the second tm?
i would be very grateful if someone answer my two questions.

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?

Atruck with 34-in.-diameter wheels is traveling at 55 mi/h. find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes:

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force