Physics Guess – Could You Enhance Length Contraction?

My guess is simple. Everything has some usefulness attached to it.

So whats the point of length contraction?

L = Lo*sqrt(1-v^2/c^2)

I don’t know but..

Since we cant get the velocity v as high as light speed then why not lower c.

Would it be possible to get a higher contracted length ratio using materials with a high refraction index?

I wonder. Could you lower the speed of light in the material enough and have some high speed particle for v traveling through it.

What could happen. Whats the use of length contraction?