Is there a speed of dark?

Darkness travels at the speed of light. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light.

wtamu.edu - What is the speed of dark? | Science Questions with Surprising Answers

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What is the speed of dark?

If you turn on a flashlight, the shadow region created by an object reaches a distant wall at the exact same moment that the light reaches the wall, indicating that darkness travels at the speed of light. Public Domain Image, source: Christopher S. Baird. Darkness travels at the speed of light. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light. Any time you block out most of the light – for instance, by cupping your hands together – you get darkness. In the context of talking about speeds, darkness is what you get after the light stops coming, and therefore travels at the speed of light. For instance, consider that you are in distant space, far from all light sources such as the sun, and you have a light bulb on the nose of your space ship. The light from the light bulb is spreading out in all directions through space at the speed of light. If you briefly turn off your light bulb and then turn it back on, there is light traveling out in all directions from before you dimmed the bulb, and behind it there is light traveling in all directions from after you dimmed the bulb. But between the two spheres of light there is no light, because no light was created when the blub was briefly off. And no light means darkness. So there is a band of darkness in between the two spheres of light. Since both spheres of light are expanding outwards in all directions at the speed of light, the band of darkness between them must also be traveling at the speed of light. You can think of darkness as what you get right after the last bit of light arrives. Since the last bit of light travels at the speed of light, the state right after must also travel at the speed of light. If the sun suddenly disappeared, it would stop shining light on the earth and the earth would go dark. But it takes 8 minutes and 19 seconds for the light from the sun to reach earth. The last bit of light given off by the sun right before it disappeared would take 8 minutes and 19 seconds to reach us, and the darkness that comes right after the last bit of light would also take 8 minutes and 19 seconds to reach us. We on earth would not see the sun disappear from the sky until 8 minutes and 19 seconds after it had vanished.

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What is the hardest book to read ever?

The 5 Most Difficult Books to Read Bleak House. By Charles Dickens. ... War and Peace. By Leo Tolstoy. ... Moby Dick. By Herman Melville. ... Ulysses. By James Joyce. ... Gravity's Rainbow. By Thomas Pynchon.

earlybirdbooks.com - The 5 Most Difficult Books to Read - Early Bird Books

All of us, at one time or another, have been assigned books to read, either in high school or in college, that we… didn’t care for, let’s say. But no matter how much you may have hated reading The Great Gatsby or Catcher in the Rye, you can’t really argue that they were particularly difficult books to get through. They’re fairly short, and while they may be thematically dense – for good or ill – they’re also relatively quick reads. Not so with the 5 books on this list. These are among the most difficult books to read, notable for the dread they often inspire in school curriculums, the complexity of their language, and the simple thickness of their spines. If you were ever assigned any of these books—or if you just made it through them on your own—then you’ve really accomplished something special. Of course, difficult isn’t synonymous with “bad,” and while many of us may have dreaded being assigned some thematically dense, linguistically challenging doorstopper of a novel in class, there’s a reason why pretty much every book on this list is a well-regarded (and much-beloved) classic. It just doesn’t change the fact that they’re not always the easiest books to read…

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