You often hear the term 'speed of light' as the fastest. What about speed of sight?

Question

how can we see hubbles deep field so soon?

Answer 1

The light we see in the Hubble Deep Field left those objects millions of years ago. That isn't very soon.



Sight is the perception of light, so the speed of sight is the same as the speed of light.

Answer 2

The "speed" of sight isn't really a speed at all - it's just you observing light at a point in time. It's like asking which is faster: the speed of darkness or light? Darkness is simply the absence of light.

Answer 3

Your question: "You often hear the term 'speed of light' as the fastest. What about speed of sight? how can we see hubbles deep field so soon?"



Your propensity to conflate neural visual processing with the speed of electromagnetic radiation is a mistake.



Further, your phrase, "see hubbles deep field so soon" is completely unwarranted.



If you were serious, you would make some effort to define what that means.



Vision is not related to the speed of light, which is much faster than neurons can process visual stimuli.



"The Neural Basis of Visual Perception"

The Rockefeller University Hospital

Accessed 18 October 2015:

• http://centennial.rucares.org/index.php?page=Neural_Basis_Visual_Perception



"Sensory Systems - MIT OpenCourseWare"

Accessed 18 October 2015:

• http://ocw.mit.edu/courses/brain-and-cognitive-sciences/9-04-sensory-systems-fall-2013/



"The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995."

• https://en.wikipedia.org/wiki/Hubble_Deep_Field



• https://en.wikipedia.org/wiki/Speed_of_light



"Hubble is one of NASA's most successful and long-lasting science missions. It has beamed hundreds of thousands of images back to Earth, shedding light on many of the great mysteries of astronomy. Its gaze has helped determine the age of the universe, the identity of quasars, and the existence of dark energy."

Accessed 18 October 2015:

• http://hubblesite.org/the_telescope/hubble_essentials/



"Introduction to Astronomy - MIT OpenCourseWare"

Accessed 18 October 2015:

• http://ocw.mit.edu/courses/physics/8-282j-introduction-to-astronomy-spring-2006/

Answer 4

The speed of the light can be defined easily. it is unique..But the sight and speed of sight is different for each person.. and the quantity of information absorbed also differs. And it is a ability , So we can't compare both.. If you have to compare both. you need to specify whose sight..



But still light can't be compared with sight..

Answer 5

The light from stars in galaxies in the deep field have been shining for a long time and the photons emitted have arrived at the telescope or your eye to see them. There is really no speed of sight except the speed at which your brain receieves a signal from your eyes that photons have hit your retina.

Answer 6

The light in Hubble's deep field images still spent billions of years traveling at the speed of light to get to the Hubble telescope.

Answer 7

The speed of sight is actually very very slow. Consider how easy it is to be fooled by a magician.

The speed of sight is the time it takes your neurons to reach a threshold of input data, move data electrically down itself, chemically cross a synapse, have the next neuron interpret and electrify and so on. The process is only a few dozen feet per second. Fortunately our eyes are close to our brain, and we only see a very small portion of our field of view in anything close to hi def. but think about how slow considering the distances ab dinosaur reacting to its tail on fire could take several seconds to perceive then move.

Answer 8

Your brain receives the light that is emitted from objects. This means that sight occurs when you realize you are "seeing" something. Sight does not travel. It has no speed. It only receives the light that comes directly to your retina at a speed of almost 300,000 km/sec. and your brain deciphers it (know what you are looking at in any moment.)

Answer 9

Do you think since you can walk out to your mail box and get a letter from your grandmother in less than a minute you are faster than the mailman's truck because it took three days for him to put it in the mail box?

Answer 10

That depends how you define sight. I would define it as your eye receiving light and sending a signal to your brain which processes the image. In that case the speed of light is much faster

Answer 11

your brain has to process what your eye is seeing when talking the speed of light that process takes a long time

Answer 12

Seriously?



Who give a damn.



The REAL worry is the Speed of Dark.

Answer 13

Your eyes can actually see no further than the photon/retina interface. The light arrives at your eyes from somewhere else. Your eyes do not transmit light, they are purely a receiver.

Answer 14

http://www.space.com/13352-universe-history-future-cosmos-special-report.html



did you know that a house fly sees at 1/6oth of a second while the human eye sees at 1/30th./second? in the house with artificial light, they are in the dark one-half of the time, due to the cyclic rate of pumping electricity to light the indoors.



the human eye sees at 01/30th of a second, even my hand blurs as it moves at 01/60th. of a second; light passes us by at -------186,282 miles/second?



A light-second is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in one second, and is equal to exactly 299792458 metres (just over 186,282 miles).