Name Tsao Chang | Education Fudan University | |
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Tsao Chang (Chinese: 张操 born 1942 in Shanghai, China) is a Chinese-American physicist.
Contents
Chang has taught physics and conducted research on the theory of space and time more than 40 years in China and the United States.
Personal life
Tsao Chang was born in Shanghai China on April 22, 1942. He met his wife Bei Lei Dong while attending Fudan university. They were wed in September 1967. They had 2 boys. Their eldest son, John Zhang was a successful business man and on the board for several public companies. Chang’s younger son, James Zhang is founder and CEO of Concept Art House, a video game developer.
Physics career
In 1965 Chang graduated from Fudan University, China with a degree in Nuclear physics. Chinadaily's interview
Tsao Chang has taught electrodynamics and modern physics in China and the United States.
From 1980—1982, he was a visiting scholar in the Physics department at the University of Massachusetts Amherst.
He taught in the Department of Physics, Shanghai University of Science and Technology from 1982—1985.
In 1985—1989, Chang was a visiting professor in Utah State University and the University of Alabama in the United States.
His research areas cover superluminal neutrinos and the theory of relativity.http://en.scientificcommons.org/tsao_chang
He has produced more than 20 research papers and two books.
From 1989—2002 he conducted research on space physics in the University of Alabama.
In an international conference "in early 1985, T. Chang predicted neutrinos may be Superluminal particles".
Since 2002, his research has centered on the theory of space and time.
Speed of Alternating Electricity
After decades of research, Chang's research on superluminal motion reached a significant breakthrough in February 2015. Chang published his paper: "Measurement of Time Delay of Alternating Electric Field in Wires" in an open access journal Modern Physics with graduate student K. Liao and Dr. Jing Fan. They published three more papers later. The latest research paper was published in November 2015, which has a title: "The Speed of Alternating Electricity Can Be 20 Times Faster than the Speed of Light."
The article states that alternating power source generates electromotive force, which generates potential differences and longitudinal electric fields in a circuit almost instantaneously. The word 'speed of alternating electricity' refers generally to the speed of electric energy from an alternating power source to an electric load (such as a resistor) in an electric circuit. The movement of electrons through a conductor in the presence of potential and an electric field is very slow. When a DC voltage is applied, The drift speed is on the order of millimeters per hour. AC voltages cause no net movement; the electrons oscillate back and forth in response to the alternating electric field.
In recent experiments, . three researchers have compared the difference of time delay of electric signals for 1-3 MHz frequency by means of two metal wires with different lengths. Our experimental results show that in less than 2 MHz frequency region, the speed of modulated alternating electric signals in the metal wire of 6 meter is more than 20 times of the speed of light. This is a type of effect of non-locality for electrical field in metal wires.