Question

Which vector, electric or magnetic, is used to represent the polarisation of e.m. waves? How will you show that light waves are transverse in nature?

Answer 1

Electric vector is used to represent the polarisation of e.m. waves.

If the plane polarised light passes through the polarizer having ${90}^o$ angle to the direction of polarization of light wave, we get zero intensity. this shows that light has transverse nature.