Can you open the door of a microwave oven when it is on?

No, you should never open the door of a microwave oven while it is on. Microwaves are a form of electromagnetic radiation, and opening the door while the oven is on can expose you to harmful radiation. This can cause serious injury, including burns and eye damage.

In addition, opening the door of a microwave oven while it is on can damage the oven itself. The sudden change in pressure can cause the magnetron, which is the part of the oven that generates microwaves, to overheat and fail. This can lead to a fire or other safety hazard.

Therefore, it is important to always keep the door of a microwave oven closed when it is on. If you need to stop the oven for any reason, simply press the "Stop" or "Cancel" button.