In a transverse wave, the particles vibrate parallel to the direction of propagation of the wave.
If medium particles oscillate up and down about their rest positions in a direction perpendicular to the direction of propagation of the wave, then the wave is called transverse wave. For example, light is a transverse wave.
BUT IN THE CASE OF LIGHT, THERE ARE NO MEDIUM PARTICLES THAT VIBRATE. SO, HOW CAN IT BE CALLED A TRANSVERSE WAVE ?