Answers

2014-06-20T18:41:49+05:30
Ray:
It is a line which goes on and on from one side like
------------------->
<------------------
      ^
      |
      |
      |
Line:
It is a line which goes on and on from both sides like
        <-------------->
          ∧
           |
           |
           |
          ∨
0
2014-06-20T21:45:15+05:30
Ray: --------------------> 
       <---------------------
      example: ray of sun
                    ray of moon
                    ray of torch
Line:------------------------------------------------------------------------------......
       example: roads
                     
                     
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