$[1$ point$]($a$)$ A beam of light traveling in air enters a rectangular glass block with refractive index n$.$ Assuming the light exits the block along the side opposite to the side it entered, what path does the light follow when it emerges from the block? $[]$ The exact path it was following when it entered the block. $[$ X $]$ A path parallel to the original path, but displaced from it$.[]$ A path perpendicular to the original path. $[]$ A path that makes an angle sin$1$ sin$1$ n $$ with the original path. $[]$ None of the above.