Quote:
Originally Posted by LadyShea
Quote:
Originally Posted by peacegirl
Quote:
Originally Posted by LadyShea
Quote:
Originally Posted by peacegirl
Quote:
Originally Posted by LadyShea
Quote:
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He said there is no direct contact with an afferent nerve ending
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What do you think a neuron is?
Photoreceptors are nerves. Light directly contacts these afferent nerves. |
It's interesting to note that with the other senses, there is a slight delay before the signal reaches the brain for interpretation. With sight, it works differently. That's why it takes time for the sound of a plane to reach us before we actually see the plane since it hasn't entered our field of view. |
What are you talking about?
Sound is interpreted from differences in pressure as they hit the receptors in the ear. Sound travels slower than light travels. That is why you can often see something before you can hear it. The light travels many times faster than the sound. |
That's not even what I said. I said that we can often hear the sound of a plane before we see see it, even when the plane is in our direct visual field with no obstructions. |
You said there was a delay in sound and that it "takes time for the sound" to reach us but that sight works differently. And used "that's why" as if it explained something in response to my post.
What exactly was your point? How is your point relevant to question asked? |
Sound is interpreted from differences in pressure as they hit the receptors in the ear.
Light allows us to see objects in the real world which only occurs when the plane is within our field of view. That's why we often hear airplanes before we can see them.