Draw an arrow such that this arrow gradually dims away?

Question

How to draw an arrow such that this arrow gradually dims away?

Say the arrow head has Opacity[1], but the arrow end has Opacity[0]?

Thank you in advance! Here is the minimal code:

Graphics[{
  Black, Opacity[1], Arrowheads[Large], Arrow[{{2.5, 2.5}, {5, 5}}]
  }]

Here is an example of the arrow: I failed to manage to gradually dims the arrow away to the arrow end.

Answer 1

Graphics @ 
 {Arrowheads[{{.1, 1, {Graphics[{Opacity[.1, Black], 
    Polygon[{{-1, 1/2}, {0, 0}, {-1, -1/2}}]}], 1}}}], 
  AbsoluteThickness[5], 
  Arrow[Line[{{2.5, 2.5}, {5, 5}}, 
    VertexColors -> {Opacity[1, Black], Opacity[.1, Black]}]]}

Graphics @ 
 {Green, Rectangle[{3.9, 3.9}], 
  Arrowheads[{{.1, 1, {Graphics[{Opacity[.1, Black], 
        Polygon[{{-1, 1/2}, {0, 0}, {-1, -1/2}}]}], 1}}}], 
  AbsoluteThickness[10], 
  Arrow[Line[{{2.5, 2.5}, {5, 5}}, 
     VertexColors -> {Opacity[1, Black], Opacity[.1, Black]}]]}

Replace Opacity[1, Black] with Opacity[1, Purple] and Opacity[.1, Black] with Opacity[.3, Orange] to get

Alternatively, without Opacity:

Graphics @ 
 {Green, Rectangle[{3.9, 3.9}], 
  Arrowheads[{{.1, 1, {Graphics[{GrayLevel[.9], 
        Polygon[{{-1, 1/2}, {0, 0}, {-1, -1/2}}]}], 1}}}], 
  AbsoluteThickness[10], 
  Arrow[Line[{{2.5, 2.5}, {5, 5}},
     VertexColors -> {GrayLevel[0], GrayLevel[.9]}]]}

Replace GrayLevel[0] with Purple and GrayLevel[.9] with Lighter[Orange, .8] to get: