A narrow beam of light S is incident on a dihedral angle 60

Last updated: 6/14/2023

A narrow beam of light S is incident on a dihedral angle 60 formed by identical flat mirrors OM and ON secured on axis O Fig 1E 19 a After being reflected from the mirrors the light is focussed by lens L and gets into stationary receiver R The mirrors rotate with a constant angular velocity A y 0 M C PM N S B Fig 1E 19 a What part of the light energy of the beam will reach the receiver during a time that greatly exceeds the period of rotation if the beam passes at a distance a from an axis equal