Why are light waves called transverse if mechanical waves are transverse and longitudinal?

[Aadrish]

i have a huge problem. the issue is
" light waves are transverse waves . transverse and longitudinal are the example of mechanical waves . while light waves are not mechanical waves"
can some one explain me

 

[tiny-tim]

" light waves are transverse waves . transverse and longitudinal are the example of mechanical waves . while light waves are not mechanical waves"
can some one explain me

"mechanical" means that there's some material that oscillates

in a sound wave in air, each bit of the air moves forwards and backwards in the direction the wave is moving …

that's longitudinal​

in a wave on water or on a rope, each bit of the water surface or the rope moves up and down (but does not move in the direction the wave is moving)…

that's transverse​

but with light, there's no material to oscillate …

it's the field (non-mechanical) that oscillates up and down​

 

[Aadrish]

so why light waves are transverse as we know that transverse waves are mechanical waves so why we deal light as mechanical wave?

 

[tiny-tim]

… we know that transverse waves are mechanical waves …

that's not true

where did you get that from?​