Question

Anyone good at lenses and mirror ray tracing? I've been stuck on this question and I really shouldn't be. The answer is 1.13 m and I keep getting 2.4 meters.....Question: You are 1.8 m tall and stand 3.0 m from a plane mirror that extends vertically upward from the floor. On the floor 1.5 m in front of the mirror is a small table, 0.80 m high. What is the minimum height the mirror must have for you to be able to see the top of the table in the mirror? I approached this question by ray tracing, but I think I'm drawing the rays wrong. Can anyone help me approach this question correctly?? Anyone good at lenses and mirror ray tracing? I've been stuck on this question and I really shouldn't be. The answer is 1.13 m and I keep getting 2.4 meters.....Question: You are 1.8 m tall and stand 3.0 m from a plane mirror that extends vertically upward from the floor. On the floor 1.5 m in front of the mirror is a small table, 0.80 m high. What is the minimum height the mirror must have for you to be able to see the top of the table in the mirror? I approached this question by ray tracing, but I think I'm drawing the rays wrong. Can anyone help me approach this question correctly?? @Physic

Answer 1

since this is a plane mirror you can draw your table on the other side of the mirror and just extend a line from the top of the image to your observer, wherever that crosses the mirror is the minimum height.

Answer 2

Thanks but I just don't know what to do after that. like, I don't know the angle of reflection...

Answer 3

the angle of reflection is the angle of incidence for a plane mirror, but I don't think that's really required in this question unless its a follow up question