In recent years, the effects of Qigong have been recognized by more and more people, and the member taking Qigong exercise has been increasing. However, the fundamental facts and mechanism of Qigong are still ambiguous. This paper treats some physics measurements associated with the 'external breath' of Qigong practitioners at Qigong state.
1. Information-modulated infrared radiation. According to the report by Gu Hanshen, the 'external breath' emitted by Zhao Wei, a famous Qigong practitioner, was proved, using modern scientific instrument, to accompany infrared radiation modulated by low frequency.
Infrared radiation is constantly emitted from all parts of human body just as from any material bodies. The ray intensity and energy distribution in wavelength are dependent on temperature distribution over the radiating surface. The temperature of the skin of person at normal condition is about 36 C while the palm temperature of Yuan Ruje, a Qigong practitioner, at Qigong state is 37.7-39.5 C. This means that infrared radiation from specific acupoints of a Qigong practitioner, when effusing breath, is more intense then that from a body at normal conditions. When taking Qigong exercise, one is required to adjust consciously the figure posture, breath, and mind. This intends oneself to secure the idea capable of controlling selfish of a highly skilled practitioner of Qigong is so effective that the temperature of some specific acupoints are fluctuating in according with idea. In Qigong terminology, internal breath travels through moxibustion then emits outward.
2. Stream of electrically charged particles. Gu Hanshen reported that, when Zhao Wei emitting external breath, a stream of electrically charged particles was detected by instruments. It was also reported by Gu Hanshen that the Qigong signal associated with emitting external breath is characterized by convective flow of air with transmitting velocity being 20-45cm/sec. Gu infrared from the experiments that the charged particles following the air flow were in the size range larger than presumable pores existing in the wall of the glass bottle and smaller than about 60 m.
Due to temperature difference between the body and ambient air, convective flow usually exists around a body. A convective flow orientated partly by the idea of Qigong practioner can be expected because temperature of certain acupoints are in the control of ides, as mentioned above, and the intentional move of the practioner hands may affect the air flow.
According to aerosol science, there are airborne particles in ambient air. These particles range from about 0.003um to about 50 um in diameter, the number concentration vary from 10^2 to 10^7 /cm. Most of them are in the submicron size. Natural atmospheric aerosols are usually charged. The charge distribution of an aerosol in equilibrium with bipolar ion atmosphere is dependent on particles size. For example, for particles of 0.3um in diameter, 24% of the total particle concentration is uncharged, 41% carrying one elementary unit of charge, 23.3% carrying two units, 9.3% carrying three units, 2.4% carrying four units. The size range and electrical behaviour of atmosphere aerosols are in agreement with the description given in Gu's report.
However, the value of transmitting velocity, 20-45cm/sec, was measured in given configuration of experimental instruments. It may vary in the circumstances because convective flow are boundary-dependent.
3. Visible luminescence from the body at Qigong state.
Visible luminescence of extremely weak intensity near to human bodies has been observed by scientists. Using photomulplier, Zheng Rongrong, Lin Yagu, and Zhong Fuxin found that when Que Ashui practising Qigong the luminous intensity in the neighbourhood of specific acupoints are in the control of his nind.
Natural substance can be made to luminesce by different external exciting agents and various types of luminescence are often classified according to the source of energy which excites the light emission. Perhaps, the visible luminescence in the vicinity of human body is attributable to electrolumine scence, exciting energy of luminescence comes from the application of an electric field. Gi Hanshen reported the concentration of negative charge in specific areas of the body surface of a Qigong practioner. Electric charge concentrated in small domains of great curvature or sharp points may result in local electrostatic field of high intensity which, in turn, excites gaseous molecules and atoms to emit light.
Composition of air near a human body will be altered by gas species evaporating from sweat gland of the body and the variation of air composition may be dependent on physiology-condition of a person. As a result, different emission spectra or colour may be observed at different individuals, at different state of a person's health, and different state of Qigong.
