Devise an arrangement of mirrors allowing you to see the back of your head. What is the minimum number of mirrors needed for this task?

Devise an arrangement of mirrors allowing you to see the back of your head. What is the minimum number of mirrors needed for this task?

Devise an arrangement of mirrors allowing you to see the back of your head. What is the minimum number of mirrors needed for this task?

In an amusement park maze with all the walls covered withmirrors,Pilar sees Hernando's reflection from a series of threemirrors. Ifthe reflected angle α from mirror 3 is 57° forthe mirror arrangement shown in thefigure, in which β =17°, what is the angle of incidence on mirror1?
1°