Shadow of Sonic the Hedgehog is immortal as he is not an average hedgehog.
The experiments which created him has made him virtually immortal and the fact that is is a character and not a real hedgehog.
Simple facts about shadows is that shadows are created when light is blocked from an opaque object.
Opaque objects are objects that light does not pass through.
The light rays that are emitted from a source are unable to pass through the solid surface which makes the shadow on the ground.
Shadows attract each other due to the diffraction phenomenon of light.
The light can be treated as particle (photons) as well as waves (electromagnetic waves) and when the distance that is between two objects is very small, in the small interval light will then act as particles and the diffraction phenomenon is what happens.
The wider the light source, the more blurred the shadow becomes.
And when two penumbras overlap, the shadows appear to attract and merge.
This is known as the shadow blister effect.
The outlines of the shadow zones can be found by tracing the rays of light emitted by the outermost regions of the extended light source.
The physics of a shadow is that shadows are light that is blocked by an object and the object can block part or all of the light.
Shadows also change in size based on how close the shadow is to the light source.
Shadows move over time due to the earth rotating in and out of daylight and the object's shadow then changes in length and direction over the course of the day.
And from earth's surface the sun also appears to move across the sky from east to west and as the position of the sun in the sky changes then the direction of any incoming rays also affects the shadow that the object casts.
Shadows create depth when in an image which is what helps to give the shadows depth.
Shadows add depth, shape, and texture to our imagery and not to mention, contrast and balance.
In some instances, shadows can even become the focus or subject of an image.
If shadows disappeared then lunar eclipse and solar would not happen anymore and planets as well as stars would become very confused.
And if shadows disappeared it would not be easy to avoid the sun's heat anymore such as under a tree.
Shadows do not occupy space nor do they have matter or energy.
Shadows are misleading because shadows do not give any clarity to the size of the object and the shadow also gives a misleading imagery of the shape of that object.
You cannot judge a material's type, size or quality or other physical properties just by looking at a shadow.
Also if a light source is near the object then the shadow will be bigger than the object is.
An amazing fact about shadows is that shadows are not really totally black.
If you look more closely at the shadow you will see a dark area that appears in the center of the shadow and a lighter area around the shadow.
The central dark area of the shadow is called the umbra which occurs where the rays of light from the source are totally blocked.
And the outer area of the shadow is called the penumbra and is lighter because some of the rays do not get through.
It is possible to have no shadow on a zero shadow day when the sun crosses the local meridian and the sun's rays fall exactly vertical relative to the object on the ground and then you cannot observe your own shadow or shadow of other objects.
Shadows are blue in hue color which means that blue is the general color for most of the shadows and most think of shadows as being black although black is a neutral color and the hue of shadows are actually blue.
Transparent objects or objects that allow light to pass through such as glass cannot form a shadow.
Things that cannot form shadows are transparent objects such as glass as transparent objects allows light to pass through.
There are 3 shadows which are an antumbra, a penumbra and umbra shadows.
Shadows do have a direction as the shadows move in the opposite direction of the sun and in the Northern Hemisphere the shadows will move from west to east and will also point north at the noon.
And in the southern hemisphere shadows indicate south at noon.
The thing that makes shadows move is the suns light that shines on the objects from different directions as the day goes on and because the earth is rotating.
Shadows are created with rays of light when the opaque object or material is placed in the path of those rays of light.
The opaque object does not allow the light to pass through it and instead the light rays go past the edges of the object and make the outline for the shadow to form.
A shadow is very fast and faster than the speed of light.
Shadows grow because the object blocks more of the light.
And the further away from the light source the object is the smaller the shadow will be.
The closer to the light source the object is the bigger the shadow will also be.
Not all objects form a shadow as only opaque and translucent objects create shadows.
Shadows are real as they occur with the blockage of light of an opaque object.
Shadows do move with us because a shadow is formed when the opaque object blocks the path of light.
So because we are opaque objects the shadow moves along with us as we block the path of light.
Shadows are faster than light.
Shadows do not have matter nor do shadows have energy.
Shadows do not have energy as a shadow is a lack of light and so a shadow has no mass which means a shadow is not an objector nor is it energy.
Shadows also can go faster than light in some cases because they are not objects.
Things that cannot form a shadow are transparent objects as shadows are only formed in translucent and opaque objects.
For example glass cannot form a shadow because light passes through it.
A shadow is black due to the absorption or the absence of light.
When the shadow is formed it occurs due to the absorption of all light by the object from a light emitting source.
All shadows are not black or dark.
When the lights of different colors shine on the same spot of a white surface the light that is reflecting from that spot to the eyes is called an additive mixture because it's the sum of all light.
When a shadow is formed it happens due to absorption of all light by an object from a light emitting source.
As a result, a shadow is produced which is due to absorption or absence of light, hence black in color.
The type of shadow that is the darkest are shadows formed by translucent objects.
The 3 properties of a shadow are they are always dark in color, they are formed opposite to the source of light and they are formed when an opaque object comes between the source of light and the screen.
The 3 conditions of a shadow are a screen, there should be a light source and there should be an opaque object.
Shadows do not need light to form although most shadows are formed by light going past the edges of the material which make the outline for the shadow.
Shadows work by way of the light rays going past the edges of the material or opaque object.
The rays of light do not pass through the object but instead go past the edges of the material.
Rays of light are what creates shadows.
When an opaque object or material is placed in the path of rays of light a shadow is formed.
The opaque material however does not let the light pass through it and instead the lights rays that go past the edges of the object or material make an outline for the shadow.
The three things that are needed to form or create a shadow are.
A source of light.
An opaque object whose shadow has to be formed.
A screen on which shadow is to be formed.