How strong is the radiation pressure when you fly with lightspeed?

[Phantom5]

Can it be that the radiation pressure is similar with sound barrier?

How can you calculate it?

My main question is, when we let out the thing with the mass away, is it the radiation pressure that stops you?

When this is correct, the solution can be that you made an engine that redirect the radiation over the spaceship.

I have an idea for it.

Or what is when you made an engine that redirects the air pressure?

 

I think it cant be the mass...

 

Does it stop when the pressure is at its maximum?

Edited December 27, 2018 by Phi for All
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[Sensei]

Quote

How strong is the radiation pressure when you fly with near lightspeed?

What you are searching for is called Greisen-Zatsepin-Kuzmin limit

https://en.wikipedia.org/wiki/Greisen–Zatsepin–Kuzmin_limit