China will invest 15 billion to do a great thing for the sounds of the universe – Sohu news ddrtys

China will invest 15 billion to do a big event to find the sound of the universe Sohu News reported that this announced gravitational wave direct detection, its signal from the 1 billion 300 million m light from the earth’s double black hole merger event, duration of about 20 milliseconds. Two mutually moving black holes are about 30 masses of mass, which emit gravitational waves at the final destructive collision, and the discovery time is September 14, 2015 (gravitational wave event number GW150914). The gravitational waves also need to explain gravitationalwave some doubts this claim is found, synchronous detection results of two more than 2000 km north-south distance of laser interferometer, but the National Observatory China science researcher Zhang Chengmin has a 90% confidence level. So, what’s 10% of the doubt? First, get the gravitational wave signal LIGO in the United States, Europe gravitational wave equipment VIRGO is no reaction, the lack of appropriate supporting information; second, the gravitational wave signal, multiple satellite detector in space, also found no Gamma ray depths of the universe burst, X- ray burst; and the ground optical telescope did not find a supernova event and radio burst. Of course, LIGO can argue that there is no mass movement around the double black hole, and that the merger may not produce enough electromagnetic energy to burst. At present, there is no external evidence of LIGO gravitational wave discovery, which may be criticized as isolated "self evidence" discovery event. LIGO needs to wait for new gravitational waves to come and confirm the reliability of the discovery. In 1979, physicists at the University of Maryland claimed to have discovered gravitational waves, which caused a sensation in the world for a while, but then questioned constantly. At that time, the sensitivity of the aluminum ingot detector was low. Now it seems difficult to detect weak gravitational waves at that time. Two years ago, someone claimed to have discovered gravitational waves, but later scrutiny found that the error was more than expected. Therefore, the arrival of another gravitational wave in the future will dispel our doubts. What is the significance of gravitational waves detected by LIGO? The discovery of gravitational waves will be one of the biggest breakthroughs in physics in the past 100 years. Here, all the predictions of Einstein are validated, and this is a perfect stop for general relativity GR. Gravitational waves have been indirectly discovered, but direct detection is the first time. As American scientists said, confirmed that the gravitational wave is one of the last "Puzzle" of GR, the other GR verification had been proved by experiments, including: the perihelion precession of mercury, the light in the gravitational field, the gravitational redshift of deflection, the time delay of radar echo, the black hole spin precession. The gravitational wave communication can contact with the remote universe and reduce interference; because the electromagnetic wave is disturbed by the atmospheric plasma, the solar wind interference, and the galaxy charge interference, the electromagnetic signal transmission distance is limited. Gravitational wave is the oscillation of material space and time, the speed of propagation is the same as that of electromagnetic wave, but it is the space-time energy fluctuation caused by accelerated motion of matter, not the fluctuation of electromagnetic field, so it is not disturbed by the charge distribution everywhere in the universe.

中国将投资150亿做一件大事 寻找宇宙之声-搜狐新闻   据推算,本次宣布的引力波直接探测,其信号来自距离地球13亿光年的双黑洞的合并事件,持续时间约20毫秒。两个互相缠绕运动的黑洞质量大约相当于30个太阳,它们在最终的毁灭性碰撞合并时发出引力波爆发,此发现的探测时间是2015年9月14日(引力波事件编号GW150914)。   本次引力波发现还需要解释一些疑惑   本次宣称的引力波发现,是南北距离两千多公里的两个激光干涉仪的同步探测结果,但是中国科学院国家天文台研究员张承民对此有90%的可信度。那么,10%的疑虑是什么?   其一,在美国LIGO获得引力波信号时,欧洲引力波设备VIRGO没有反应,缺少相应的佐证信息;   其二,引力波信号出现时,多个卫星探测器在空间工作,也没有发现宇宙深处的Gamma射线爆发、X-射线爆发;而地面光学与射电望远镜也没有发现超新星爆发和射电爆发事件。当然,LIGO可以如此反驳,双黑洞外围没有大量物质运动,其合并也许不会产生足够的电磁能量爆发。   目前,LIGO的引力波发现还没有外部佐证事件,这可能被诟病为孤立的“自证”发现事件。LIGO需要进一步等待新的引力波信号到来,再次证实其发现的可靠性。1979年,美国马里兰大学物理学家宣称发现引力波,一时间轰动世界,但是之后的质疑声音不断。当时的铝锭探测器,灵敏度较低,现在看来那时很难探测微弱的引力波信号。   两年前,也曾有人宣称发现了引力波,可是后来的仔细审查发现其误差超过了预期。因此,未来的再次引力波信号到达将打消我们的疑虑。   LIGO探测到引力波的意义何在?   引力波的发现将是物理学100年来最大的突破之一。到此,爱因斯坦全部预言获得验证,这为广义相对论GR画上完美句号。   引力波曾经间接被发现,但是直接探测这还是首次。正如美国科学家所言,引力波的证实是GR的最后一个“拼图”,GR的其它几大验证早就被实验所证明,包括:水星近日点进动、光线在引力场偏折、引力红移、雷达回波时间延迟、黑洞、自旋进动。   引力波通信可以与遥远的宇宙实施联络,而减少干扰;由于电磁波受到大气层等离子体干扰、太阳风干扰、以及银河系电荷干扰,所以电磁信号传输距离有限。引力波是物质时空的振荡,传播速度与电磁波一样,但是它是物质加速运动造成的时空能量波动,而不是电磁场的波动,所以不受宇宙到处分布的电荷干扰。   可以设想,高度文明的外星人已经使用引力波通信技术,进行星际通讯传播信息,可惜地球人类无法接收其信号;而我们的电磁信号即使传到其它星球,也可能信息失真,这导致我们彼此在茫茫宇宙中互相寻找,不得知己。相关的主题文章: