Is it possible to break the time barrier if we break the light-speed barrier?
I think if you can break the light speed barrier, you may able to break the time barrier(even stop the time itself). Faster you are, slower the time.You won't be able to see thing behind you or in front of you. Electromagnetism(light) is one of the super forces. If anyone wants to answer my theory of science, please do. I would be glad to hear your answer!!
Because of the travel time of light, we see more distant parts of the universe as they were when the universe was younger, but?
we cannot see back “into” times when the universe was opaque and light could not travel freely. Using photons, then, what is the furthest back in time that we can see as we look out into the universe? a. 1/1,000,000 seconds after the start of the Big Bang b. 3000 years after the start of the Big Bang c. 500,000 years after the start of the Big Bang d. 3 minutes after the start of the Big Bang
Can we see light, or do we see objects that reflect light?
If there is ray of light in front of you, but there are nothing to reflect it, then you will not see it although it is passing in front of your eyes. As a result:1- The space always looks dark although there are a lot of light (photons) passing through.2- LASER beam can’t be detected unless there are particles (reflecting or scattering) it.Laser Light Scatters off Chalk DustSo, the answer to this question will be:A) Yes, We can see the “source” of light directly, but we can't see its beam. For example, if you in space and the sun behind you, and you are looking in the opposite direction, then you will never see the sun’s beams crossing you, you even will not know if there is a source of light behind you -if we suppose there is no thermal energy from the sun and there are no objects ahead of you can reflect Sun light- unless you turn and look directly to the source.B) No, we can't see the light if there are nothing to reflect it, but usually -go back to the space example- at least our body will reflect the light which passing through, so we know there are beams of light.(Source: Space sun planet wallpaper)From this picture, you can realize that: there are huge amount of light beams during the day time on Earth due to the sun, however we can’t see them anywhere between the sun and Earth, but we can see their reflection on earth.I hope, this answers your question:).Edited:“Why do we see the reflected light but not the original one?”If this question crosses your mind, then the answer will be again: You actually Can Not see the reflected light; because the original and the reflected light both of them are photons. But as we said before, you can see the source of light if you look directly toward it. So, in the case of the reflected light, the electrons of the object which reflects the light absorb the energy of photons of the origin light then emit them toward you, so that object acts like a source of light which you can see.
Why is it when you hit one red light you hit them all?
,City Traffic Engineers. Depending on the city some are timed on timers, some are run off a pressure plate in the black top in the opposite / cross flow traffic. Some time when you get stopped at the light look around most times you can see them or see where the cut out is. when they are correctly done if you maintain your speed according to speed limits you can get all green lights > BUT Again it depends on the traffic engineers who installed them & set them up . Some times no matter what you do you can get it right. So sit at the red light crank up the tunes take a few breathers & enjoy life, dont race through life it will end too soon as it is..
What would the night sky look like if we could see the star light we normally see in real time?
Oh, you mean if a person just walks outside to a dark, cloudless sky?Naked eye, it’d pretty much like any unaided visible view.It’d be a different story if you looked in wavelengths other than visible light, especially Infrared, but also UV, radio, gamma, the further away you get from visible light. It’s also different with the aided eye. This is where Galileo gets a lot of credit for bringing the telescope into astronomy; night or day (you can see Sunspots (like I did when I was 9 years old)).The atmosphere has spectral windows, mostly set by water, which are a little annoying which is why telescopes are placed on mountains, or in planes, in satellites, etc.It also depends on the latitude. If you only live in the Northern hemisphere, it’s great to see the Southern sky (take a good look at the Northern sky before you travel).
Does time slow down at the speed of light or would it totally stop?
Light is massless, carries no charges of any kind, produces no gravitational field, and has no time dimension in the ordinary sense. Light carries information about distant events to observers. It moves at an absolute velocity of "c". Time, as we mortals experience it, moves forward in the direction of a universe with greater entropy. Were it any other way, the laws of thermodynamics, and particularly of causality would be violated. As for the rate at which time moves forward for an observer, it varies in accordance with the observer's velocity with respect to "c", (as well as other things such as gravitational fields). As for the relationship between light and time, it is irrelevant. The velocity of light is constant regardless of reference frame, which means that for a light beam, its "experience" of crossing the universe is the same, everywhere. It doesn't experience velocity, distance or time. It just travels through space at "c", and that's all we really need to know about it. As for 300,000 km/sec, that's just our point of view; our way of describing how light behaves in our reference frame. Complicated stuff... That's just my take on it.
What is the oldest light we can see in the night sky without the assistance of a telescope?
According to http://astronomy-mall.com/Advent... and http://link.springer.com/chapter..., the farthest objects that can be seen with naked eye are http://en.m.wikipedia.org/wiki/C... and http://en.m.wikipedia.org/wiki/M... at distances of 10-16 Mly and 15.21 Mly respectively. So I'd put the age of oldest light we can see with naked eye somewhere around the 14 million years mark.Interestingly, at 06:12 UTC on March 19, 2008, a brilliant http://en.m.wikipedia.org/wiki/G... was detected[1] which was visible with the naked eye for almost 30 seconds[2]. That was 7.5 Gly away and so the light that could have be seen at that time was 7.5 billion years old.[1] http://www.nasa.gov/mission_page...[2] http://heplx40.fuw.edu.pl/pi/ot/...
Why after we turn off the light we can't see anything but after few minutes we can see almost everything?
The eyes need to adapt to the low lighting condition after you switch off the lights, a process called dark adaptation.The process behind the reduced visual function when going from bright ambient light to low-lighting conditions is caused by a process called dark adaptation. The visual system works on a huge intensity scale. The only way to do that is by adapting to ambient lighting intensity.The sensitivity of our eye can be measured by determining the absolute intensity threshold, i.e., the minimum luminance of a stimulus to produce a visual sensation. This can be measured by placing a subject in a dark room, and increasing the luminance of the test spot until the subject reports its presence.Dark adaptation refers to how the eye recovers its sensitivity in the dark following exposure to bright light. The sensitivity of the visual system increases approximately 35 times after dark adaptation.Dark adaptation forms the basis of the Duplicity Theory which states that above a certain luminance level (about 0.03 cd/m2), the cone mechanism is involved in mediating vision, called photopic vision. Below this level, the rod mechanism comes into play providing scotopic (night) vision. The range where two mechanisms are working together is called the mesopic range, as there is not an abrupt transition between the two mechanism.The dark adaptation curve shown below (Fig. 1) depicts this duplex nature of our visual system. The sensitivity of the rod pathway improves considerably after 5-10 minutes in the dark. Because after you switch off the light the rod system is still inactive, you are unable to perceive much. The reason why rods are inactive is because they are said to be photo bleached. Photo bleaching refers to the visual pigments in the rods and cones to become used up because of the high light intensities when the light was still on. The pigment needs to be regenerated and that takes time.