Wat evidence do we have that light can travel through a vacuum?And how??
Isit yes or no??evidence!!
2007-02-06 04:27:06 · 11 answers · asked by aleX 1 in Science & Mathematics ➔ Physics
Look out the window - where do you think all that daylight comes from?
2007-02-07 00:12:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Well, you could do one of two quick experiments. One is to look at a clear light bulb like those used in a night light. These have an exceedingly good vacuum inside, and you'll notice that light goes right through.
And, if you accept that the space between us and the sun is a vacuum--and you should not do so without being presented with other evidence--then the fact that the light from the sun gets here is a good indication that it has travelled through a vacuum.
Note, however, that this last one is not all that obvious. How _do_ we know that there's a vacuum between us and the sun? Ask your teacher. I haven't seen any really great, obvious evidence that this is so.
2007-02-06 04:54:35 · answer #2 · answered by 2n2222 6 · 0⤊ 1⤋
Space is a vacuum, if light weren't able to travel through a vacuum, then we wouldn't get any light from the sun or other stars.
2007-02-06 05:28:37 · answer #3 · answered by Mr.President 2 · 0⤊ 0⤋
Technically, there is no true vacuum anywhere, due to the fact that there are pairs of oppositely charged particles coming in and out of existance, but in space, which would be a vacuum if it weren't for that, there obviously is light from stars and such moving.
2007-02-06 05:16:57 · answer #4 · answered by apocalyps956 2 · 0⤊ 0⤋
Hi Megna,
Some interesting answers that you have - however, may I add one ?
There is no such thing as a perfect vacuum.
Even deepest space has a few hydrogen & helium atoms about.
Dyson ? OK, goodly machines for a carpet.
As for electro-magnetic radiation, ok, light included, of course it goes from A to B , but not as sometime previously beleived, in a straight line..
You can bend it, thus reducing the transition period.
It takes a solar system to do it though.
You ask for evidence, mon ami.
At exactlly 11:00 GMT on 12th March 2007, like tomorrow, I bounce a laser signal to our moon & back..
It will show that the signal is "bent", due to stuff in the atmosphere.
I bet. & on the way there & back.
No such thing as a vac, my fellow. !
Bob
2007-02-06 06:15:44 · answer #5 · answered by Bob the Boat 6 · 0⤊ 0⤋
Did light reach us from the sun??....Yes
Is there a vacuum between us and the sun??....Yes
So...light has travelled through a vacuum.
It does so as it is electromagnetic radiation,it does not need a medium to travel through,unlike sound...which can't travel through a vacuum.
If a bomb exploded in space you would not be able to hear it,only see it.
2007-02-07 21:48:30 · answer #6 · answered by Anonymous · 0⤊ 0⤋
What i am going to allow you to already know is between the unbreakable guidelines of physics ,, it states that : Electromagnetic Waves Can commute by Vacuum besides as count number ......... So ,,, mild is an Electromagnetic Wave ,, so it is going to commute in vacuum ,,, this change into proved with assistance from the try & authentic existence journey " sunlight mild" .............
2016-11-02 12:00:54 · answer #7 · answered by wolter 4 · 0⤊ 0⤋
the fact that light from distant stars does get to us, travelling through space is the proof - space is a close to vacuum as you can get.
2007-02-06 04:33:38 · answer #8 · answered by roy_gavish 2 · 0⤊ 0⤋
You would never get a torch sucked up by a dyson, no matter how good they are.
2007-02-06 05:03:49 · answer #9 · answered by Anonymous · 0⤊ 0⤋
Is it very dark where you are, or is the sun shining?
2007-02-06 05:33:59 · answer #10 · answered by Martin 5 · 0⤊ 0⤋