Area 51

How AREA 51 works?

Less than 100 miles from Las Vegas, Nevada is the most famous secret military installation on the planet. Rumors swirl around this base, much like the mysterious aircraft that twist and turn in the skies overhead. Although it's known by many names, most people call it by the Atomic Energy Commission's (AEC) designation: Area 51.

There are several theories about how Area 51 got its name. The most popular is that the facility borders the Nevada Test Site (NTS). The AEC used the NTS as testing grounds for nuclear bombs. The NTS is mapped as a grid of squares that are numbered from one to 30 (with a few omissions). Area 51, while not part of this grid, borders Area 15. Many say the site got the name Area 51 by transposing the 1 and 5 of its neighbor. Another popular theory is that the number 51 was chosen because it was not likely to be used as part of the NTS system in the future (in case the NTS expanded later on).

The first documented use of the name Area 51 comes from a film made by the company Lockheed Martin. There are also declassified documents from the 1960s and 1970s that refer to a facility called Area 51. Today, officials refer to the facility as an operating location near Groom Lake when speaking to the public -- all official names for the site appear to be classified.

The name alone inspires thoughts of government conspiracies, secret "black" aircraft and alien technologies. Facts, myths and legends weave together in such a way that it can become difficult to separate reality from fiction. What exactly goes on in this installation? Why did the government alternatively acknowledge and deny its existence until the 1990s? Why is the airspace over it so restricted that even military aircraft are forbidden from flying through it? And, what does it have to do with Roswell, New Mexico?

Each question seems to have a million different answers. Some answers are plausible, while others stretch credulity so far that if someone said it out loud, you might feel the urge to back away from them slowly. In this article, we'll look at the facts as far as anyone outside of the facility can determine them and examine the more popular theories about Area 51.

Apa Akan Terjadi Jika Kita Bergerak Selaju Kelajuan Cahaya?

Apa Akan Terjadi Jika Kita Bergerak Selaju Kelajuan Cahaya?

Pada awal 1900-an, saintis berpegang teguh kepada pandangan Newtonian . Kemudian seorang ahli matematik dan fizik kelahiran Jerman bernama Albert Einstein datang dan menukar segala-galanya. Pada tahun 1905, Einstein menerbitkan teori kerelatifan khas, yang mengemukakan idea yang mengejutkan: Tiada pilihan bingkai rujukan. Segala-galanya, walaupun masa, adalah relatif. Dua prinsip penting disokong teorinya.

1. Yang pertama menyatakan bahawa undang-undang fizik,  sama dalam semua rujukan bingkai pegerakan. 
2. Yang kedua berkata bahawa kelajuan cahaya - kira-kira 186,000 km sesaat (300,000 kilometer sesaat) - adalah berterusan dan bebas daripada gerakan pemerhati atau sumber cahaya. 

Menurut Einstein, jika Superman ingin mengejar pancaran cahaya pada separuh kelajuan cahaya, pancaran akan terus bergerak dari dia pada kelajuan yang sama.
Konsep-konsep ini seolah-olah nampak mudah, tetapi mempunyai beberapa implikasi minda-lentur. Salah satu yang terbesar diwakili oleh persamaan terkenal Einstein, E = mc ², di mana E adalah tenaga, m ialah jisim dan c adalah kelajuan cahaya. Menurut persamaan ini, jisim dan tenaga adalah entiti fizikal yang sama dan boleh diubah antara satu sama lain. Kerana kesetaraan ini, tenaga yang mempunyai objek kerana gerakan akan meningkat besar-besaran. Dalam erti kata lain, lebih cepat satu objek bergerak, lebih besar kebesaran. Ini hanya menjadi ketara apabila objek bergerak terlalu pantas. Sebagai contoh, jika sesuatu bergerak pada 10 peratus kelajuan cahaya,  kelajuan  akan menjadi 0.5 peratus lebih daripada biasa. Tetapi jika ia bergerak pada 90 peratus kelajuan cahaya, kelajuan pegerakan akan berganda.
Sebagai objek menghampiri kelajuan cahaya, kelajuan naik mendadak. Jika objek yang cuba untuk bergerak 186,000 km sesaat, kelajuan menjadi tidak terbatas, dan begitu juga tenaga yang diperlukan untuk menggerakkannya. Atas sebab ini, objek tidak normal boleh bergerak sepantas atau lebih cepat daripada kelajuan cahaya.