What is why wrap a doorknob in aluminum foil?

Wrapping a doorknob in aluminum foil is believed to block or reduce the transmission of electromagnetic fields (EMFs). EMFs are invisible areas of energy that are emitted by electric and electronic devices, including cell phones, Wi-Fi routers, microwaves, and so on.

Some people are concerned about the effects of EMF exposure on their health, and wrapping a doorknob in aluminum foil is one of the ways people try to reduce their exposure. The aluminum foil creates a barrier that blocks or absorbs some of the EMFs, preventing them from entering the room or affecting the people inside.

While there is some evidence that high levels of EMF exposure can pose health risks, the scientific community is divided on the issue. Some studies have found links between EMF exposure and cancer, reproductive problems, and other health issues, while others have found no evidence of harm.

Wrapping a doorknob in aluminum foil is a relatively simple and inexpensive way to reduce EMF exposure, but it may not be effective at completely blocking all EMFs. It's also important to note that EMFs can come from many sources besides doorknobs, so reducing exposure may require a more comprehensive approach.