Answer:
The basic theme behind the movie interstellar on which it is based is the theory of relativity that was suggested by Einstein.
Explanation:
As per Einstein theory the twin sister theory explains, how time is relative in nature that if two sisters war twins one of them remains behind. And other travels in space after a certain ears cap the one thing on earth would age.
While the other would not the same theory was followed in the movie. And the main cast of the movie who was the hero did not age while his daughter ages with respect to time so when the meet her daughter is much older than him.
The movie also shows the theory behind black holes and how it feels inside the black hole.
