Why does holding a key fob to your head increase its range? (physics.stackexchange.com)

Article summary

The article discusses the phenomenon of holding a key fob to one's head to increase its range. The exact mechanism is not specified in the article, but commenters suggest it may be related to the body acting as an antenna. Commenters also share their personal experiences and experiments with this technique. The article's content is not available, but the discussion reveals various theories and tests.

Main themes

• key fob range extension
• antenna effect
• RF safety
• body as antenna
• ground interference
• experimentation and testing

What commenters say

• Holding a key fob to the head increases its range due to the skull acting as an antenna.
• The body's water content may be responsible for the increased range.
• Ground interference can affect the key fob's range, and holding it near the body can reduce this interference.
• Some commenters believe the technique works by bouncing radio emissions off the body, while others think it's related to the liquid in the brain.
• The safety of using this technique is questioned, with some arguing that RF exposure is harmless and others expressing concern about potential health effects.
• Experiments with water bottles and other objects have yielded mixed results, with some finding no effect and others reporting increased range.
• The frequency and energy of the key fob's signal are considered to be relatively low and safe.
• The comparison to other sources of RF exposure, such as cell phones and microwave ovens, is used to argue for or against the safety of the technique.