Qiskit, Quantum Computing, Grovers Algorithm, Quantum Algorithms, Algorithms.
a reflection around ‘s′’, then ‘s’. By definition of a reflection, the angle between the first reflection and ‘s′’ is θ. The angle between these two lines are 2θ. So, when we reflect in ‘s’, the total rotation towards ‘w’ is 2θ. Each cycle rotates ‘s’ towards ‘w’ by 2θ. We need to cover ‘π/2’