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I know sound can bounce around endlessly and echo back under the right conditions so that it's possible for an old radio broadcast to be heard many years after the broadcast is no longer being sent out. My questions is - is it possible that the image of a person could be left behind somehow or way much like a radio wave and that under the right conditions it could actually be seen as a faded or transparent image giving you the impression of seeing or being visited by someone who has died. I do understand there is a big difference in a sound wave and a image of something or someone, is it at all possible for an image to linger and be seen again, could light waves become trapped and reflect back a persons image creating what people would mistake for a ghostly apparition? if this is not in anyway possible can someone explain to me the reasons why it's not possible. Thank You.