How come shadows get blurrier the farther it is from an object?

Question

The contact point in which the shadow touches the object is way sharper than say 5 metres from the object that’s casting a shadow. How come?

In: Physics

Answer 1

There’s this little thing called diffraction in the way unfortunately. What it means is that the light does not go straight from the source. It can “bend” around edges a little which makes shadow edges blurry. The farther the object is from shadow the more light can get dispersed.