# Laser action on one side mirrors (half silvered) and prisms

I know that half silvered mirrors are used in the production of laser emission. Can half silvered mirrors be used outside the instrument so the rays get reflected back on one side of the mirror and pass through the other side?

What will be the result if a half silvered mirror is kept rotating and laser is made to pass through it?

Similarly what will be the result if a prism is kept rotating and laser is made to pass through it?

Series of prisms and mirrors are used in the instrument to produce laser but can we obtain more patterns (movement of laser in entertainment lasers) when we keep a rotating half silvered mirror and prism (different cases) and laser is made to pass through it?

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Highschool physics simplifies its application in a laser resonator to the fact, that transmission $T=0.01$ and reflection is $R=0.99$. Light hitting the the mirror will be reflected several times inside the two mirrors of a laser resonator. Inside the laser resonator is the the active medium which clones the photons and thereby amplifies the light power. However a small amount of will be transmitted through the mirror as a laser beam.