question_answer

A plane mirror lies face up, making an angle \[{{15}^{o}}\] with the horizontal. A ray of light shines down vertically on the mirror What is the angle of incidence? What will be the angle between the reflected ray and the horizontal be?

Answer:

Angle of incidence\[={{15}^{0}},\] Angle of reflection \[={{15}^{0}};\] The reflected ray makes an angle of \[{{30}^{0}}\]with the vertical and \[{{60}^{0}}\] with the horizontal. (see the figure for further understanding)