Whether you believe in ghosts or not. you have to admit that stories of ghost exist all around the globe. The best explanation of why ghosts mostly appear at night is perhaps because most people are scared of the dark since they can’t see anything and imagine thing to be there that aren’t. However,there is a science-based theory too. The earth’s almosphere is bombarded by solar radiation from the sun more during the day then the night. During this bomberment,atoms in the almosphere lose their eletrons and become ions that restrict some lorms of electrical activity in the almosphere. Ghosts are believed to be energy-based manifestations so it’s easier for them to manifest at night.