RobJ said:
So a deaf scientist can argue there is no such thing as sound? So a dogs whistle really doesn't make any sound(because I can't hear it), just a quoincidence that dogs come a running.
Why will sound waves produced by sound break a glass...in a room full of deaf people.
Thunder will break a window if the town is empty.
If I hold my nose does that mean there is no smell? (Hang around after some bean chili.
)
I can't see air...so is it really there?
If I close my eyes does that mean there no light? Infra red light is just a lie?
Velvet feels the same as concrete if I never touch it?
And I guess a bear doesn't crap in the woods...as long as I don't see, feel, touch, smell it.
And if the trees were cut down...I could see the forest.
Heck maybe red is really blue and blue is really yellow. and yellow is really red, heck they are just names we gave them.
To him there isn't, but I said "a" brain without specifying human.
Yes there is since the dog's brain can hear it.
Because the glass vibrates sympathetically with the correct frequency, resonates if the shape of the glass is correct, and the motion of the molecules of silicon dioxide vibrate enough to separate from one another, causing the glass to lose its structural integrity and fall apart.
Thunder is a very seriously large wave of alternating high and low pressure. If the window is large enough the difference in pressure inside to outside during the passage of the wave causes the window to bow in and out, ulitimately breaking the glass the same as if you pushed on it hard enough.
You "smell" things because molecules of that substance are landing on your olfactory organ (buried deep in your nasal passages) and causing nerve messages to pass to the olfactory center of your brain. "Smell" is simply molecules in your nose -- remember that next time you clean out the barn.
Yes, but you can't visually prove it unless you have a lot of it to look through.
"Light" is a term used to describe a certain portion of the electromagnetic spectrum. Originally it was reserved for that portion to which nerves in the human eye are sensitive, but we now of other organisms that can sense in a similar manner other frequencies, and therefore use the term to refer to those, too. Your microwave works with the same stuff, travelling at the same speed, but with a different wavelength. So does your car radio, non-cable TV, cell phone, speed radar, etc. The proper term to cover all of it would be electromagnetic radiation.
Neither one feels like anything to you if your brain gets no information about it.
Yeah, but not the one that used to be standing in front of you.
Absolutely right. We have no definitive proof that what I think of as red your brain might not call blue if we could get the same thing going on in both of them. We were both trained early on that the wavelengths that cause that particular activity in our brain were called "red" so that's what we call it.
Rattlesnakes can sense infrared with special organs, the eyes of a bee are sensitive to ultraviolet. A brain interprets those wavelengths in a manner akin to our vision, so we call them "light". Dogs ears and those of bats for that matter, are sensitive to wavelengths that are far above ours, but those are "sounds" since some brain hears them. Whales use frequencies far below those which the human ear responds to, but those are also "sounds" since a brain interprets them as such.
If you want something to puzzle over, explain how to describe a color such as yellow to a person who has been blind since birth, a sound to a person who has been deaf since birth.
It all goes back to the old saying about beauty being in the eye of the beholder but the "eye" is actually the brain's interpretation of the message sent to it by the eye. That's why some of us like red tractors, some green, some blue and some orange.
