CURRENT AFFAIRS

Detailed explanation-1: -The Sukhoi Su-75 Checkmate (Russian: -75; LTS, short for Light Tactical Aircraft in Russian) is a single-engine, stealth fighter aircraft under development by Sukhoi for export and for the Russian Aerospace Forces. The Sukhoi Design Bureau also designates the aircraft as T-75 with marked registration RF-0075.

Detailed explanation-2: -Pyotr Yakovlevich Ufimtsev (sometimes also Petr; Russian: ́ ́) (born 1931 in Ust-Charyshskaya Pristan, West Siberian Krai, now Altai Krai) is a Soviet/Russian physicist and mathematician, considered the seminal force behind modern stealth aircraft technology.

Detailed explanation-3: -F-117, also called Nighthawk, single-seat, twin-engine jet fighter-bomber built by the Lockheed Corporation (now part of the Lockheed Martin Corporation) for the U.S. Air Force. It was the first stealth aircraft-i.e., an aircraft designed entirely around the concept of evading detection by radar and other sensors.

Detailed explanation-4: -Russia’s premiere stealth fighter, the Su-57 Felon, is said to have a radar cross-section of between 0.1 and one square meters and is broadly considered to be around 0.5. Russia - and most of the world - call this a stealth fighter…