The minimum number of mirrors one could use to redirect the beam around the obstacle, so it hits the wall in the same place assuming the laser pointer must remain still is two mirrors.
One of the practical applications of plane mirrors is in the construction periscopes.
Similar to the periscope, in the case of the obstacle to the laser beam, two plane mirrors can be used.
One mirror is placed in front of the obstacle at an angle such that the beam is diverted to the second mirror placed at a second position so as to redirect the beam to the point.
Therefore, the minimum number of mirrors one could use to redirect the beam around the obstacle, so it hits the wall in the same place assuming the laser pointer must remain still is two mirrors.
Learn more about about mirrors and periscopes at:
https://brainly.com/question/3952884
https://brainly.com/question/3447867