It does not matter how far away the person is standing (as long as it's not 0 distance!).
If you draw a ray from the top of the person to the mirror and back to the person, the point that the person sees is exactly twice as far down as where the reflection is in the mirror.
Since the mirror is 1/2 has tall as the person, it will thus reflect the entire 1.7m of the person.
You don't care about points that are perpendicular to the mirror, just know that the angles of incidence and reflection are equal.
A flat mirror that is 0.85m tall is attached to a wall so that its upper edge is 1.7m above the floor. Use the law of reflection and a ray diagram to determine if this mirror will show a person who is 1.7m tall his or her complete reflection.
I don't know how to draw it, the light reflected by the feet that is perpendicular to the mirror is not reflected as the mirror is too small, but how can I show this?
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