The Guardian sometimes sets brain-teasers, and this current one has me baffled -
The challenge is to design a room that has a single light source (a bulb hanging from the ceiling, say) where all the walls are straight but at least part of every wall is shaded from the bulb (no line of sight to the bulb from at least one spot along the wall). There's no limit to how many walls, but the straight wall sections need to join, so the cross-section of the room is a polygon. You can’t have a free-standing wall, or stick-out projections that are bound to be in shade.
The original article, illustrated, in which one entire wall and part of another are shaded.
I hope it's not a trick question, and have no idea when the answer will be given :)
The challenge is to design a room that has a single light source (a bulb hanging from the ceiling, say) where all the walls are straight but at least part of every wall is shaded from the bulb (no line of sight to the bulb from at least one spot along the wall). There's no limit to how many walls, but the straight wall sections need to join, so the cross-section of the room is a polygon. You can’t have a free-standing wall, or stick-out projections that are bound to be in shade.
The original article, illustrated, in which one entire wall and part of another are shaded.
I hope it's not a trick question, and have no idea when the answer will be given :)
via International Skeptics Forum http://ift.tt/1Sx0KrO
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