0
How long does it take a beam of light from 4.36 light years travel to earth?
Wiki User
∙ 14y ago
Alpha Centauri is the nearest star to us not including the sun.
Which is approx 4.3 light years away.
How long would it take to reach this star from earth.
It depends how fast you are traveling.
At the speed of light, called 'c', which is approx, 186,000 miles pers second!
Or approx 670, 000, 000 per hour!
If you travelled at this speed for 4.3 years then you would get there.
1 light year is approx 5,878,630,000,000 miles. ( 5.8 trillion miles) So times that by 4.3 and that is your distance.
If you ran at about 10km per hour it would work out to about 6.7 miles and hour, (a very rough ball park, approx).
Therefore it would mean that your running is 100, 000, 000 times slower than than the speed of light and therefore it would take you 430 000 000 years to run there.
What about the run back? And I think you would get tired and die of old age by then.
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoLike any other trip, the time required would depend on your speed of travel.
Here is the time required for several averagespeeds (not counting time to
speed up to it or slow down from it):
- Speed of light . . . 42 years
- Speed of sound . . . 36.7 million years
- Driving, 70 mph . . . 401.2 million years
- Walking, 4 mph . . . 7 billion years
- 1 million mph . . . 28,147 years
Wiki User
∙ 13y agoIf you start walking right now, you can walk for the rest of your life and never get off the Earth. And no spacecraft currently in existence can carry you further away than Mars, or perhaps Jupiter.
IF - and that's an enormous "if" - IF there were some critically important reason why we needed to send a probe to the Alpha Centauri system, and IF we devoted all of our attention and treasure to do so, we could probably launch an unmanned probe to Alpha Centauri (4.5 light years away, and just beyond Proxima Centauri at 4.2LY) by 2025, and the probe might arrive within 50 years. If we spent another 15 years developing the technology, we could probably make the trip in half the time.
If the requirement were to send living people there, and have a chance that someone would still be alive upon arrival, then it would take at least 50 years to develop the spacecraft, and probably 100+ years enroute. It ought to be possible to do with an Orion nuclear pulse rocket design.
Wiki User
∙ 14y agoAbout 4.36 light years
Wiki User
∙ 14y agoAbout 3.785 x 1013 kilometers
Add your answer:
Earn +20 pts
What is solar angle and Beam spreading?
solar angle is the angle at which a ray of light hits the earth. Beam spreading is how energy is distributed on earth because of solar angle
How many light years away from earth is mercury?
Mercury Is 0.000131 lightyears away from earth
Hiw long does it take for a light beam from the sun to hit the earth?
From the time the light photon is generated in the core of the Sun, it may take millions of years to get to the surface. But once it reaches the surface of the Sun, the Earth is only 8 minutes 20 seconds away!
How long will it take you to get to a star 5000 light years away?
It takes a light-beam or a radio signal 5,000 years to get there, traveling a straight-line path.If you could travel the same path at a speed of 19,000 miles per second, (1/10th the speed of light),you could make the same trip in only 5 million years. Of course, then you'd be 5,000 light years from home,and it would take 5,000 years just to let the folks back home know that you had arrived safely.No, interstellar travel doesn't seem like a smart place to focus your money and effort.
How far would a star on the far side of Andromeda be from earth?
The Milky Way galaxy is 100,000 light years across and 1,000 light years thick. But the really fun part is that the Milky Way is all around us. We are right inside the Milky Way; it is our home galaxy. The Milky Way is not far away from you; you are a part of it.
How long would it take a beam of light to travel the solar system?
My science teacher told our class that a beam of light takes approximately 8 min. to get to planet Earth.
What is the travel time in earth years from the earth to the sun?
if you are a beam of light, travelling 300,000 km/s, you can do it in about 8 minutes. If you are a car travelling at a steady 100 km/h (62 mph), it would take 171 years
Do light travel to a single direction only?
The light from our sun radiates out in all direction as the sun is ball-shaped. The part of light that strikes the earth, forming daylight, is spread over a wide area of the earth that happens to be facing towards the sun at the time. This means that light doesn't travel in a single direction. A laser beam is an example of a concentrated beam of light travelling in a single direction.
If a light beam travels for the entire lifetime of the universe how far does it go?
A light beam that travels for the entire lifetime of the universe would cover a distance of approximately 13.8 billion light-years. This is because the observable universe is estimated to be about 13.8 billion years old in terms of light-travel distance.
How far is 21 million light years?
21 million light years is a distance of 1.23448496 × 10^20 miles. In other words, it would take a beam of light 21 million years to travel that distance.
How fast does lighthouse beam travel?
at the speed of light
What is beam spreading?
Beam spreading is when the sun's rays (or angles) spread out because the earth is in it's revolution and rotation. However this is the definition of beam spreading relating light and the amount of light received to earth, not relevant to another meaning. So basically beam spreading is when the sun's light spreads on earth.
The star alpha centaur is about 4.3 light years from earth how far is the distance in miles if a lightyear is the distance light beam that travels once 1 year And a beam of light travels 186000?
I would say 4.3 x 186000
What is a straight beam of light called?
A straight beam of light is called a ray of light. Rays of light travel in a straight line from their source until they are interrupted or reflected by a surface.
A beam of light is made of?
A beam of light is made of photons, which are massless particles that carry electromagnetic energy. When a light source emits photons, they travel in waves at the speed of light, illuminating their surroundings.
How long would it take a laser beam to go from earth to Sirius?
Since sirius is 8.6 light years away and light travels at the speed of light including lasers then guess what?? It's gonna take 8.6 years...
How do you use beam in a sentence?
The beams of the Sun has reached the Earth's surface.
