Why do shadows change shape when light is shone on them?

[danielhaish]

if you put a light on object you will see shadow in the shape of the object . it would looks like the following picture

the blue part is the object.
but if you point a laser or light on specific object you will be able to observe it from differences angles like in the following picture

the black circles are quemen eyes and the red point is leaser .
so my question is whether the light spreading or not because if it does spread i would expect the shadow shape to looks like that

but if it doesn't the light would return only to one angle

 

[Dale]

my question is whether the light spreading or not because if it does spread i would expect the shadow shape to looks like that

 

[danielhaish]

this exactly my point we can see that the light stay in sharp shape but we can observe it from other angles how the lights get to other angles

 

[Dale]

this exactly my point we can see that the light stay in sharp shape but we can observe it from other angles how the lights get to other angles

The light gets to other angles by reflection.

 

[A.T.]

so my question is whether the light spreading or not

Sometimes it does, and sometimes the rays are almost parallel.

 

[sophiecentaur]

Not many natural light sources are points so the light does not all come from exactly the same direction. So the shadow will get more and more blurred as you get closer. Look up Umbra and Penumbra to see things like shadow softening and what you can really see during an eclipse.
Edit: BEG your pardon - the fuzz gets worse as you get further away. If the Moon went way beyond its present distance, (from us) our umbra would be so small that we would never get a total lunar eclipse. The Sun is so much bigger than us.