We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [perception]

The tag has no usage guidance.

13 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
2
votes
0answers
28 views

Inverting Horizon?

everyone knows that looking at the horizon at something going far away, the last thing you see from it is its top, but what if you had a ground going up very very very slightly and something moves ...
1
vote
0answers
59 views

What causes observed color differences in white LED's for near and far fields?

While running towards traffic early morning before sunrise I recently noticed that the new automobile LED (white) lights when viewed at a distance appear blueish, but when the light is viewed much ...
1
vote
2answers
127 views

Colors of the Earth from space, an “average” of particular emitters?

When we're say about 100 km above Earth's ground and look down to it and see the Amazonian region as green, is this green color a sort of "average" of greens from trees from that forest or is the "...
1
vote
0answers
83 views

Why does scratching a blackboard gives such a painful noise?

I think we all have heard that terrible sound coming from scratching a blackboard with your nails. How is it produced? Has it something to do with the length of our nails?
0
votes
0answers
41 views

Why don't we see/feel charged particles, penetrating our brains/retina?

If we see tracks in bubble or Wilson chamber, it means that particles are everywhere and can leave tracks in gases and liquids. They can also penetrate concrete of the building levels in the lab. So ...
0
votes
0answers
37 views

Why does the wind close doors?

Assume you have two rooms, both with holes in the wall (more commonly known as open windows), which connect each room to the exterior. The two rooms are connected, but the connection can be closed by ...
0
votes
0answers
46 views

How to explain this thumb experiment?

Close your thumb to your eyes and align your eyes, thumb and moon. Then focus your eyes on your thumb and watch the moon behind your thumb. You will find that the moon becomes small! Remove your thumb ...
0
votes
0answers
31 views

The rise of BCI

If EEG and MEG are measuring different aspects of neural oscillations, why can't we measure the combined signals as a whole, when we are doing the same for higher frequencies? Why did the us navy ...
0
votes
0answers
74 views

How does the flicker fusion threshold prove time perception?

The flicker fusion threshold allows us to see when an animal can distinguish a flash of light and when they can only see a solid light. They have proven flies can see the light flicker at almost 240hz ...
0
votes
0answers
343 views

What is “unseen blue light” from LED lighting?

In the Washington Post story Some cities are taking another look at LED lighting after AMA warning I noticed the phrase "unseen blue light" in the first full paragraph: The American Medical ...
0
votes
1answer
72 views

How to phrase the question of measuring the frequency of a complex sound?

I was hoping I could crowd source some understanding. Im interested in understanding the measuring of sound pitch. From what I've been able to gather thus far- sounds are waves of air pressure and ...
0
votes
1answer
59 views

Could we recognise if time was running at a different rate for one species than another? I.e a human and an ant

My question is quite simple if time ran at a different speed for smaller creatures, how would we be able to observe this or confirm by experiment?
-4
votes
1answer
219 views

Does the perception of time depend on the Mass/Height of the Observer?

Okay. We were discussing the following thing at work. Situation: Imagine a high building. If it falls sideways, it takes a lot of time in our perception. Now imagine something MUCH smaller. If we ...