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

Brief Explanations:

Electromagnetic waves consist of oscillating electric and magnetic fields. These fields are perpendicular to each other and also perpendicular to the direction of wave propagation. Transverse waves are defined as waves where the particle displacement is perpendicular to the direction of wave travel. Since the electric and magnetic fields in electromagnetic waves meet this criterion (perpendicular to the direction of propagation), electromagnetic waves are transverse waves. Longitudinal waves, on the other hand, have particle displacement parallel to the direction of wave travel (e.g., sound waves in air), which does not match the nature of electromagnetic waves.

Answer:

transverse