No, it is not safe to put a spoon in a microwave oven. Metal objects, including spoons, should not be placed inside a microwave because they can cause sparks, arcing, and potentially damage the microwave or pose a fire hazard.
Microwaves work by emitting electromagnetic waves that are absorbed by water, fats, and sugars in food, causing them to heat up. Metal objects reflect these waves, which can lead to the production of electric currents and arcing. This can damage the interior of the microwave, cause a fire, or even result in injury if the metal becomes hot and is touched.
To ensure safety when using a microwave oven, it is best to only use microwave-safe containers and utensils made of materials such as glass, ceramic, or microwave-safe plastic. Always refer to the manufacturer's instructions and guidelines for your specific microwave model to ensure proper usage and safety precautions.