Physicists have lowered the boom on ghosts and, while they were at it, vampires.
According to Professor Costas Efthimiou of the University of Central Florida, a theoretical physicist, ghosts can’t both walk and pass through solid objects, such as walls, any more than, presumably, they can talk and chew gum at the same time. To walk requires the exertion of force to propel oneself forward, because a stationary object will remain stationary unless an exterior force is exerted upon it.
When we (and, presumably, ghosts) walk, we exert force on the floor or ground, and this downward-directed force (an action) causes an opposite and equal reaction, the lifting of our foot, which propels us forward.
The exertion of such a force requires a material body (here, represented by the foot, which is attached to the ankle bone, which is attached to the shin bone, and so forth), and material bodies, alas, cannot pass through solid objects. However, if ghosts are spirits and, as such, have no material form, they cannot exert the force necessary to walk.
Mathematics proves vampires are impossible, because, if they were real, and they went around biting people to turn their victims into fellow vamps, even at the rate of one victim per month, in two and a half years, their whole supply of victims (the human race) would have been converted into pantry (or maybe freezer) items.
Fortunately, horror writers, fans, and critics have a powerful counter to these eggheads: Samuel Taylor Coleridge’s famous law of counterphysics: the willing suspension of disbelief, so there!
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