Question

what type of a wave is an electromagnetic wave? transverse longitudinal

Explanation:

Electromagnetic waves are transverse waves. In transverse waves, the particle displacement is perpendicular to the direction of wave propagation. For electromagnetic waves, the electric and magnetic fields oscillate perpendicular to each other and also perpendicular to the direction in which the wave is traveling. Longitudinal waves, on the other hand, have particle displacement parallel to the wave direction (e.g., sound waves in air).

Answer:

transverse