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If the light arrives first because it is faster, then shouldn't I observe her lips move then a delay in the sound?
QuoteIf the light arrives first because it is faster, then shouldn't I observe her lips move then a delay in the sound?Yes, but you have to be very observant. The speed of sound in air is around 1100 ft/sec, so you probably won't notice the difference at less than 100 ft separation, and nice ladies don't shout. She could however clap her hands at the end of a long garden. I was going to suggest firing a gun, but given your exasperating nature, you might find the outcome unacceptable.
Quote from: TheBoxIf the light arrives first because it is faster, then shouldn't I observe her lips move then a delay in the sound?You see the flash of lightning before you hear the thunder. It's really scary when they arrive at the same time (it happened to me once...).Our brains unconsciously "know" that light is faster than sound, so our brains are quite tolerant of the image arriving before the sound. But whenever the sound arrives before the image, we get a feeling that something is subtly "wrong" (the "lipsynch" problem at the movies). We are much more sensitive to sound arriving early than late. In reality, it takes your brain about 100ms to process the sound, and 300ms to process the image, so in integrating the two, your brain slows down the speech so it is in sync with the image.
When you see the flash of lightning, what are you seeing the flash of lightning ''compared'' too?
When seeing the lightning, are you saying that an observer closer to the lightning on Earth see's the lightning before an observer on the space station?