A funny topic about SR

This doesn't seem like a funny question.

I could try to answer it seriously rather than make a funny remark. Do you understand how reference frames work? You need to understand how reference frames work before we can have any type of intelligent discussion about relativity.

You are asking about the "angle of light"... do you mean "frame of reference" rather than "angle"? Are you suggesting that "light" is an observer?

Just to poke your imagination.... why does it seem to you that light can't reach "any place of cosmos instantaneously"?

I would like you to explain why you made this conclusion (which doesn't seem obvious to me).

Dear,
"...from the angle of light" in the OP of course means "light" is the observer. Although it's not a man, physics rules are applicable to it too.
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I don't know why you think that light can reach any place in cosmos instantaneously...Light from the sun needs about 8 minutes to reach the Earth...

I think the first problem is that you don't understand relativity. Relativity depends on a "frame of reference" ... velocities are measured differently based on different frames of reference.

You are suggesting a frame of reference in which case the cosmos would be infinitesimally short... and your "light observer" would logically be able to travel to any point of the cosmos instantaneously. What you are missing is that just because this is true in one frame of reference, doesn't mean it is true in other frames.

We have to start with basic relativity... you can't understand this at all without grasping the fundamental idea of relativity.

I will help you with this if you would like. There is one concept that is difficult for students to grasp, you have to be patient. Everyone who studies physics in college has to work through this in their second or third semester. I will help you through this if you would like.

The OP hints that 3D space is not sufficient enough to describe the motion in nature as well as Einstein's SR can be extented.
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Next is explanation in X4 Theory:
Light is in the matter state of X4 = ∞
When X4 = ∞, it’s very special situation, the 4D space Gama factor Ý = 1. Then Lorentz transformation is L’ = L. That means from the view/angle of light, space does not contract. More interesting △t’ = △t, so, L’/△t’ = L/△t, namely c’ = c, It means light speed is a constant in different inertial frames.