Gravity and general theory of relativity
Gravity and General theory of relativity: Gravity: what is gravity? It is an illusion extract by two objects with non-zero mass. Not only, gravity means the Apple falls on the earth. You may consider two objects in the space an astronaut and an apple, in this case both two objects pulling other object towards each other. The astronaut pulling the Apple towards him and the Apple pulling the astronaut towards it. This attractive force between any two masses is called the gravitational force . Gravitational force is an attractive force between any t...