Why Tear Come In Robot Eyes ?

Artificial Intelligence 

 Is Modern and most researching flied in this century.so  most researching topic in A.I is emotion  in robot or Love feeling In robots .That-way the best love in this world is the love between the baby and His/her Mom .

In Artificial Intelligence (2001) movie 

Advanced robotic boy become "real" so that he can regain the love of his human mother.

  David id 11 year old.in this movie His love is real because he is in learning phase and in 

David mind have a Mecha that is put by the researcher and Mecha mapping emotion in 

mind .Mecha is memory type some thing that store environmentall feeling and love feeling

with his mother  .So point is that when his mother is feeding information in his Mecha.

So note this point  robot in the bed like box and his mother (Women) Starting A reading 

with the story of Adam  and day by day mother feed some story for creating basic level of 

love ,feeling , emotion thatsway she start from love of Adam And God .One day during to the  feeding some Story of Emotions Mother Go sad start crying and robot(Divid) is in learning phase so it get emottion of sadness or love break feeling   give Tears.

 

In the start we know that a human just have many resources and now in this centry human not have resources then it introduc day by day...

to creat a artificail being is a Dream 0f A Man 

the artificial being is a reality , a prefect simulacrum  articulin limb articulm in speah a 

lack of of human resource ...not lacking a human respond , even pain-memory respond 

...ao these all robot have universally adapted Mecha its make for use 100's of model serving humans i all multipictyof daily level...

In the end of movie, when other robots find him, they get information of his past from memory .They create virtual House with his memories and desires etc. First They fulfill his first desire and meet him with real Blue Fairy and after that they create his mother. All these things was according to his desire not from reality that’s why he got tears in his eye because crying like boy  also his desire.