A jet propelled aircraft can work only in atmospheric region why
Answers
In any jet propelled aircraft,the main working theory is the third law of the Newton,"Every reaction has a same amount of opposite reaction."
The jet engine produces a thrust like force which is repelled by the atmospheric pressure, according to the Newton's third law.
But in the non atmospheric space there will be no atmospheric pressure that will repell the thrust force.
That's why the jet planes only work in atmosphere.
"The engine requires oxygen to operate. Space rockets will normally have some kind of liquid fuel similar to the ones used in jets with a reserve of oxidizer to allow the fuel to combust, this supplying the lack of oxygen in space. An aircraft’s engine relies on the atmospheric oxygen to do that and therefore operating your engine in space would not be possible.
An aircraft, unlike a Soyuz rocket for example, does not rely just on the engine’s thrust, but also on the lift produced by the airfoils. Granted, you could probably create an aircraft that has that much excess thrust that it would be able to take-off vertically at 90 degrees, but then you’ve just created a rocket."