Quote:
Originally Posted by peacegirl
Quote:
Originally Posted by Dragar
Quote:
Originally Posted by peacegirl
Quote:
Originally Posted by Dragar
Quote:
Originally Posted by peacegirl
Quote:
Originally Posted by Dragar
That last paragraph is particularly bizarre.
We know we can use the light to make images. But in in Lessan's world, what we see should not match what is recorded on, say, a CCD, since the latter is information carried by light (which took time to reach us), while the former is what we see (and hence took no time to reach us).
What a weird way of trying to view the world.
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A light source can project images onto a CCD. There's no conflict here. |
Yes, there is. If we see according to how Lessans thought, we should see things instantly. But we know that light has a finite speed. So our images from light should be of the past, while what we see is the present. Those are two different things.
So why don't they? |
Dragar, this has been the topic of conversation for hundreds of pages with no resolution [in my opinion]. The question still remains: Are we seeing the past due to the finite speed of light, or are we seeing the present due to light being a condition of sight? |
That's just a dodge.
If Lessans is right, then what we see (being instantaneous) is different to images constructed from light (which is not instantaneous) using a CCD (for example).
But when we compare these two things, in reality they are not different. Why? |
I'm not dodging anything. I'm saying that in order for an image to show up, there must be an object or an light source present. A photon can be independent of its source, but for the light to be able to create a past image of an event or scene, is what is being disputed. |
No, peacegirl. Light cannot provide instantaneous information about the
present state of its source, having taken a finite time to reach us. That is even worse than light moving instantly.
If that idea were correct, we could never take an image, using
light, of the Sun at dawn, peeking over the horizon. Recall that when light first reaches the CCD (for example) from the Sun (having taken eight minutes, remember), then the Sun would no longer be peeking over the horizon - it would have risen eight minutes ago. Our first images constructed from
light from the Sun should show it eight minutes over the horizon, never just peeking over. Pictures of the Sun when at dawn (i.e. when we first see it), using light (which arrives
after we first see it - light takes time, seeing doesn't, remember?), would be impossible.
So, now what? Is it now the case we cannot use
light to form any images at all? Or that we can make images of the sun using light,
before its light has reached us? Or does light now travel instantaneously? Or something else?