Here's why:
* Transverse Wave: A transverse wave is a wave where the direction of oscillation is perpendicular to the direction of wave propagation. Think of a wave on a string: the string moves up and down (oscillates) while the wave travels along the string horizontally.
* Electromagnetic Radiation: Microwaves are a type of electromagnetic radiation. Electromagnetic radiation consists of electric and magnetic fields oscillating perpendicular to each other and to the direction of wave propagation. So, it fits the definition of a transverse wave.
* Microwave Oven: The microwave oven itself is a device that generates and directs microwaves. It's not the wave itself but the machine that produces the wave.
To sum it up: Microwaves *are* transverse waves. But a microwave oven is a device that *produces* those waves. It's like saying a guitar is an example of a sound wave, when in reality, the guitar is an instrument that produces sound waves.