TY - GEN
T1 - A method of comparing the speed of starlight and the speed of light from a terrestrial source
AU - Wu, Jingshown
AU - Chang, Shenq-Tsong
AU - Tsao, Hen-Wai
AU - Huang, Yen-Ru
AU - Lee, San-Liang
AU - Chang, Cheng-Chieh
AU - Lin, Wei-Cheng
AU - Tsay, Ho-Lin
AU - Wang, Yi-Lung
AU - Huang, Po-Hsuan
AU - Hsu, Ming-Ying
AU - Hsu, Chia-Wei
AU - Lin, Shu-Chuan
AU - Hung, Yung-Jr
AU - Shiu, Ye-Li
AU - Hsiao, Yung-Chung
AU - Chang, Je-Yuan
AU - Tsai, Din Ping
AU - Huang, Ting-Ming
AU - Young, Hong-Tsu
AU - Liu, Yi-Cheng
AU - Chang, Chung-Min
AU - Chiang, Wei-Chieh
AU - Huang, Ji-Ying
AU - Chen, Ya-Hsin
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2013
Y1 - 2013
N2 - The speed of light is an important physical parameter. Currently it is a common belief of the constance of the speed of light regardless of the relative velocity between the source and the observer. Because the speed of light is very fast, if the relative velocity is small compared with the speed of light, it is difficult to detect the effect of the relative velocity on the measurement of the speed of light. In this paper we present a method of comparing the speeds of starlight and the light emitting from a terrestrial source. We use a telescope to collect the light from the star having significant relative velocity with respect to the earth, e.g. Capella. Then we modulate the starlight and the light emitted from the local source into pulses i.e. these pulses leave the modulator simultaneously. After travelling 4.2 km, these pulses are detected by a receiver. If the starlight and the terrestrial light have the same speed, then these pulses must arrive at the receiver at the same time. Our results show that the arrival times of the pulses of starlight are different from that of the local light. For example, the Capella is leaving away from the earth. The Capella pulses arrive later than the local light pulses. It indicates that the speed of Capella starlight is slower than the common believed value, c. The presented method uses one clock and one stick, so the clock synchronization problem and any physical unit transformation can be avoided. © 2013 SPIE.
AB - The speed of light is an important physical parameter. Currently it is a common belief of the constance of the speed of light regardless of the relative velocity between the source and the observer. Because the speed of light is very fast, if the relative velocity is small compared with the speed of light, it is difficult to detect the effect of the relative velocity on the measurement of the speed of light. In this paper we present a method of comparing the speeds of starlight and the light emitting from a terrestrial source. We use a telescope to collect the light from the star having significant relative velocity with respect to the earth, e.g. Capella. Then we modulate the starlight and the light emitted from the local source into pulses i.e. these pulses leave the modulator simultaneously. After travelling 4.2 km, these pulses are detected by a receiver. If the starlight and the terrestrial light have the same speed, then these pulses must arrive at the receiver at the same time. Our results show that the arrival times of the pulses of starlight are different from that of the local light. For example, the Capella is leaving away from the earth. The Capella pulses arrive later than the local light pulses. It indicates that the speed of Capella starlight is slower than the common believed value, c. The presented method uses one clock and one stick, so the clock synchronization problem and any physical unit transformation can be avoided. © 2013 SPIE.
KW - PMT
KW - rotating mirror
KW - speed of light
KW - starlight
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84888376986&origin=recordpage
U2 - 10.1117/12.2023127
DO - 10.1117/12.2023127
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9780819496829
VL - 8832
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - The Nature of Light: What are Photons? V
PB - SPIE
T2 - The Nature of Light: What are Photons? V
Y2 - 26 August 2013 through 29 August 2013
ER -