The use of the human hand as a powerless infrared source of radiation

A research team at Jiao Tong University of Shanghai has found that the human hand can be used as a powerless infrared radiation source (IR) in various types of applications. In their paper published in Proceedings of the National Academy of Sciences, the group notes that the human hand naturally emits IR and they demonstrate that the radiation can be captured and used.

The human body radiates light in the invisible IR series, including the hands. The researchers noted that this radiation source could potentially be captured and used in applications ranging from signal generation to encryption systems. They further noted that because the hand has multiple fingers, the IR it emits can be considered multiplexed.

IR is a form of electromagnetic radiation – its wavelengths are longer than those of visible light, and therefore people can not see it. Previous research has shown that the human body emits such radiation due to body heat. Electromagnetic radiation carries radiant energy and its behavior is classified as a quantum particle and a wave. Previous research has also shown that electromagnetic radiation can be used in a variety of applications, including microwaves, radios, and medical imaging devices. Infrared light in particular allows night vision goggles, spectroscopy devices and medical devices to treat fire victims. In this new experiment, the researchers found that the very small amount of IR emitted by the human hand is sufficient for use in various devices.

The team started by creating a device that could separate the IR emitted by a hand from the IR. They then sprayed a low reflective material on an aluminum base and found that the two devices could be used together to encode messages at ambient temperature. They noted that when a human hand is used as a light source for the device, its IR emission is reflected by all the regions, including those with a high IR, the higher the IR can distinguish the IR radiation , which provides a way for building in a decryption process. The researchers suggest that their device proves that human-generated IR is sufficient to build IR-based devices. They also note that their device can be customized to use fingers as encryption keys.

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