physics

A thin plate glass window with a refractive index 1.5 is tapered at a 5° angle. You are looking from the outside through such a window at an angle of 30° with respect to the normal and see a person standing there behind the window (very similar to the fish tank we discussed in class). If a person is standing in the house 2m
behind the window how far of your line of sight are they really standing as opposed to where they appear to be? If at the outside position you have a gunman is looking inside under the same angle of 30 °standing trying to shoot the person in the inside of the room.How far away from the window should the person in the inside be, so that a bullet fired along the line of sight of the gunman will miss the person in the inside by 1m

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