Penrose Stairs

Never ending stairs or Penrose Stairs

Penrose stairs

                                 

The Penrose stairs or Penrose steps, also dubbed the impossible staircase, is an impossible object created by Lionel Penrose and his son Roger Penrose.A variation on the Penrose triangle, it is a two-dimensional depiction of a staircase in which the stairs make four 90-degree turns as they ascend or descend yet form a continuous loop, so that a person could climb them forever and never get any higher. This is clearly impossible in three dimensions.

                                

The "continuous staircase" was first presented in an article that the Penroses wrote in 1959, based on the so-called "triangle of Penrose" published by Roger Penrose in the British Journal of Psychology in 1958. M.C. Escher then discovered the Penrose stairs in the following year and made his now famous lithograph Klimmen en dalen (Ascending and Descending) in March 1960. Penrose and Escher were informed of each other's work that same year.^[2] Escher developed the theme further in his print Waterval (Waterfall), which appeared in 1961.

It was also appeared in some movies like inception which is one of my fav movie.

Though its still practically impossible to make such stairs.

Thank you. And HAPPY 68th REPUBLIC DAY INDIA.