Putting your hand in a microwave while it is running can be extremely dangerous and should never be attempted. Microwaves emit electromagnetic waves, specifically microwaves, that are designed to heat and cook food. These waves are highly penetrating and can easily pass through human tissue, including your hand.
If you were to put your hand inside a running microwave, the microwaves would quickly penetrate your skin and tissues, causing the water molecules in your hand to vibrate rapidly. This intense vibration generates heat and can lead to severe burns and tissue damage. Microwave radiation is particularly dangerous to the eyes and the testes, as they are sensitive to the effects of microwaves and can be easily damaged.
In addition to the risk of burns, microwaves can also cause electrical shock if you touch the internal components of the microwave oven while it is running. Microwave ovens have safety mechanisms built-in to prevent radiation leakage when the door is closed, but tampering with the oven can bypass these safety measures.
In summary, putting your hand in a microwave while it is running is an extremely dangerous and ill-advised action that can result in severe burns, tissue damage, and other serious injuries. Always follow proper safety guidelines and use microwave ovens only as intended for heating and cooking food.