Questions about a Laser Interferometer pattern

[snuz2001]

TL;DR

Interference without splitting

Is it possible to get an interference pattern if the original laser beam is not splitted before reunited? Can I use 2 mirrors which will be separated 2 cm from each other and they reflect the light from the incident ray 500 meter far which is then reunited to get an interference pattern on a screen, so if I’ll move one mirror half wave length the interference pattern will change on the screen?

 

[kuruman]

Like a Michelson interferometer?

 

[berkeman]

Can I use 2 mirrors which will be separated 2 cm from each other and they reflect the light from the incident ray 500 meter far

What is the coherence length of a typical laser beam?

https://en.wikipedia.org/wiki/Coherence_length