Attaining speeds faster than light

[Mikefromlondon]

is light also polarised? I am sure it is because I have a filter that blocks light coming in but allows another light to go out, these circular polarised filters are used on some gadgets display where internal 7 segment LEDs can emit their light but blocks incoming light so as to give a high contrast.

When you place two such filters one above the other, they can block complete light, now I am not talking about LCD here, which can be made to block or reduce light using electrical charge, which twist crystals to create barriers to light as used in digital watches using LCD displays.

perhaps we could use such phenomenon to our advantage on car headlights so that on coming traffic do not glare our vision.

 

[JBR]

When you place two such filters one above the other, they can block complete light, now I am not talking about LCD here, which can be made to block or reduce light using electrical charge, which twist crystals to create barriers to light as used in digital watches using LCD displays.

perhaps we could use such phenomenon to our advantage on car headlights so that on coming traffic do not glare our vision.

Yes. A polarising filter can be thought of as a grid. When two are superimposed with the 'grid direction' aligned, they act to reduce light polarised in the same direction, but when you twist one so that the 'grids' are perpendicular to each other they, in theory at least, block all light.

I'm not sure how this could be applied to car headlights, though. Such filters would effectively just turn off the lights.

 

[jockscott]

Mike, as the "religious nut" on here, have you ever thought that "God" might not want us to go faster than the speed of light?

 

[Mikefromlondon]

It is said, somewhere, doesn't matter where, but it is said, God created man with intelligence and a free will, so it is in the hands of man to find out a way to beat the speed of light, whether man can do it is another issue, may be He knows already when he created man that no matter what, man cannot achieve breaking the speed of light , because man does not possess infinite amount of energy, but I do he said!

and It is also said that Man is capable of doing anything, I have given him free will he said, if he abuses this free will, he will reap the results, I shall not interfere he said, man will soon find out what is good and what is bad for him.
I have made man to learn from his mistakes, and follow good things and not to follow path of evil.

Yes the only thing is here that I put the above in my own version of words.

So stay within the laws of Universe.
Don't overeat, you will get fat
Don't drink too much or you will lose your sense and lose your balance and dignity.
moderation is the answer.
too much sex and you will go blind!

 

[megawatt]

These "laws of the universe" everyone keeps talking about are simply theories proposed by humans and proven by humans.

When Ohms "law" was theorised, proposed and accepted it was not considered possible for a conductor to have zero resistance and yet this is now the case ... Things move on and we can only create our "laws" within the context of our (relatively cosmically limited) understanding at the time.

Given that we are, in all likelihood, amoeba's in the cosmic gene pool, it's likely that the more advanced species out there have overcome these "laws" to travel across the universe.

If we're still around as a species in a few million years, we may be doing the same.

MW

 

[crank39]

Yeah but would a plane on a moving conveyor belt be able to take off that's what I want to know

 

[jockscott]

Yeah but would a plane on a moving conveyor belt be able to take off that's what I want to know

All depends if the conveyor belt is travelling at (or near to) the speed of light.

 

[sooey]

Hey meggawatt, have you come back to take joe up on his geetar challenge?

 

[Mikefromlondon]

These "laws of the universe" everyone keeps talking about are simply theories proposed by humans and proven by humans.

When Ohms "law" was theorised, proposed and accepted it was not considered possible for a conductor to have zero resistance and yet this is now the case ... Things move on and we can only create our "laws" within the context of our (relatively cosmically limited) understanding at the time.

Given that we are, in all likelihood, amoeba's in the cosmic gene pool, it's likely that the more advanced species out there have overcome these "laws" to travel across the universe.

If we're still around as a species in a few million years, we may be doing the same.

MW

I have been using Zero Ohm resistors in a printed circuit borad for a few years now!

unless you are talking about superconductors, but how much energy do they require to keep them superconducting?

 

[JBR]

These "laws of the universe" everyone keeps talking about are simply theories proposed by humans and proven by humans.

When Ohms "law" was theorised, proposed and accepted it was not considered possible for a conductor to have zero resistance and yet this is now the case ... Things move on and we can only create our "laws" within the context of our (relatively cosmically limited) understanding at the time.

Given that we are, in all likelihood, amoeba's in the cosmic gene pool, it's likely that the more advanced species out there have overcome these "laws" to travel across the universe.

If we're still around as a species in a few million years, we may be doing the same.

MW

I have been using Zero Ohm resistors in a printed circuit borad for a few years now!

How can you have a zero ohm resistor? It wouldn't resist!

unless you are talking about superconductors, but how much energy do they require to keep them superconducting?

They just need to be kept very cold. Normally, this would require energy to reduce the ambient temperature, although in space...

 

[jockscott]

I have been using Zero Ohm resistors in a printed circuit borad for a few years now!

How can you have a zero ohm resistor? It wouldn't resist!

Zero ohm resistors exist only so manufacturers can bridge copper tracks on circuit boards with links which can be used by the automated machines used in circuit board manufacture. Years ago these would be simple bits of wire soldered on by hand

 

[sooey]

Simple bits of wire aren't going to have a resistance of zero ohms.

 

[jockscott]

Simple bits of wire aren't going to have a resistance of zero ohms.

For the purposes of circuit boards, they're as near as dammit.

Sooey, have you ever measured the resistance of a piece of copper wire about a centimetre in length?

 

[JBR]

I have been using Zero Ohm resistors in a printed circuit borad for a few years now!

How can you have a zero ohm resistor? It wouldn't resist!

Zero ohm resistors exist only so manufacturers can bridge copper tracks on circuit boards with links which can be used by the automated machines used in circuit board manufacture. Years ago these would be simple bits of wire soldered on by hand

I thought he was joking! Are you joking? Are you telling me that someone makes resistors that have no resistance (OK, negligible resistance)?

If so, what makes them better than a bit of wire?

 

[Mikefromlondon]

Let me think I have been using them since 1991, and they are sold as Zero Ohm resistors, they look almost like resistors except they have a cream colour body with a single black band.

They are cheaper to use than a normal copper/tinned wire link, as you don't have to cut sections of wire from a reel and then form them to a pitch to fit on PCB. So cutting wire and then forming them costs more time than getting zero Ohm resistors on a bandolier that can be fed to a component bending machine and formed a few thousand in a few minutes!


Now, you do also get just simple wires on a bandoliers, that you could use instead, these can also be formed on component bending machines, but the main disadvantage with them is they cannot be mounted close to each other as the links could touch adjacent links and cause shorts, since the wire could stretch or bend and short out, so having an insulated body that looks like a resistor prevents adjacent links touching each other when placed close to each other eg. ona data bus, which consists of number of tracks in parallel that must bridge other tracks.

google for a picture as posting a link on here stretches the trhead!