Question
Thu February 07, 2013 By:
 

why are rays of light coming from distant object considered parallel??

Expert Reply
Fri February 08, 2013
Actually distant objects radiate light in every direction.
So when we see that light at a fixed point, all we see is rays coming from a single point (as the radiating object is too far away) and hence we can assume that all the rays have equal disance between them, and hence they all are parallel to each other.
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