What's the Difference Between Two Bottles in a Dark Room?

[humanbeing]

hi,

i have some question here.
if there is a dark room, and two bottle is there. there have the paper on the two bottom, and one of the bottle is vacuum. let say, a flashlight in the bottle is direct to the bottom, what is the different about two bottle?

 

[Ryan_m_b]

Ok I'm going to assume English isn't your first language, let me go over what you are trying to ask.

There is a dark room
In this room there are two bottles
They both have paper on the bottom
One bottle contains a vacuum
We shine a light down the bottom of both bottles

Is your question what is the difference in how the light passes through? I am really not sure what you are asking

 

[humanbeing]

haha...you are true, English isn't my first language.

and that is my question

 

[Ryan_m_b]

Ok, well the speed of light is fastest in a vacuum. So shining a light through a bottle filled with vacuum means it will come out the other end marginally faster than the bottle filled with air. Does this answer your question?

 

[mrspeedybob]

The air in the non-vacuum bottle will absorb some wave-lengths of light and scatter others. The intensity of the light striking the paper in the bottle of vacuum will be slightly higher then in the bottle of air so it will experience a slightly greater force resulting from momentum transfer from the light. Heating of the two bottles will be different because the bottle of air will convert some light to heat within the air whereas the bottle of vacuum will only heat from the glass and the paper. There may be other differences but that's all I can think of for right now.

 

[humanbeing]

ah...

thanks a lot, i just want to know how the air effect the light. the answer is enough to me.

 

[humanbeing]

Beside, the light is pass through straight line.
And, we can see because the light can reflect.

Why we can see the laser as a straight line?

 

[sophiecentaur]

Ok, well the speed of light is fastest in a vacuum. So shining a light through a bottle filled with vacuum means it will come out the other end marginally faster than the bottle filled with air. Does this answer your question?

I think you mean marginally SOONER.