The speed of light

There is this one experiment where people measured the speed of light coming from the sun at sunset and sunrise and in theory the light should be going faster at sunrise and slower at sunset because of the rotation of the Earth.  The results of the experiment were that the speed of the light coming from the sun was the same on both tests, and flat earthers have cited this as proof that the Earth does not rotate, but the round Earth explenation for this is that the speed of light is always constant and that is the foundation of general relativity.  Flat earthers generally don't believe in general relativity because it implies some strange things, and they claim that the speed of light experiment can be dismissed if the sun is a 32 mile wide sphere that's 1,000 miles from the surface, but the probelem is that the flat Earth model requires the sun to be moving around in the sky in an orbit above the North Pole, and in FET, the sun should be going away at sunset and getting closer at sunrise, so this experiment either proves that General relativity is true or that both flat Earth theory and the standard model are false.

At least one flat earther has posted that there is no such thing as the speed of light.

Some have also posted that the speed of radio waves (which are also the same or nearly the same as the speed of light) are erroneous and not a constant. If this was so things like radar would be impossible.

Various FE's are in disagreement about the distance from the earth to the sun:
It could be "about" 15 Kilometers (9.3 Miles), 100 Miles, 200 Miles, 3000 Miles.....

There's an old conundrum about the speed of light.

If I'm standing in the middle of the road at night, and a car is travelling towards me at the speed of light (299,792,458m/sec) with its headlights on, can I see its headlights or not?

   

There's an old conundrum about the speed of light.

If I'm standing in the middle of the road at night, and a car is travelling towards me at the speed of light (299,792,458m/sec) with its headlights on, can I see its headlights or not?

   

I suppose it probably wouldn't be a car anymore but only particles of light. If a solid body like a car would somehow transform into light particles then I guess you would have a beam of light the size of the car shine on you instead of only the two headlights.

At least one flat earther has posted that there is no such thing as the speed of light.

Some have also posted that the speed of radio waves (which are also the same or nearly the same as the speed of light) are erroneous and not a constant. If this was so things like radar would be impossible.

Various FE's are in disagreement about the distance from the earth to the sun:
It could be "about" 15 Kilometers (9.3 Miles), 100 Miles, 200 Miles, 3000 Miles.....

Gosh commercial airplanes would get scorched with the sun just under 2 miles above the highest average altitude.

The FE'ers require GR to be true in order to explain their constant acceleration model (which has been easily disproved in the past, but since when has the presentation of a disproof made them abandon a theory?). They can't have it both ways.

There's an old conundrum about the speed of light.

If I'm standing in the middle of the road at night, and a car is travelling towards me at the speed of light (299,792,458m/sec) with its headlights on, can I see its headlights or not?

   

SR says that light will travel at the same speed, but speed is relative. 

There's an old conundrum about the speed of light.

If I'm standing in the middle of the road at night, and a car is travelling towards me at the speed of light (299,792,458m/sec) with its headlights on, can I see its headlights or not?

   

No you can't. It will be shifted out of the visible spectrum.

Quote from: ausGeoff on January 01, 2015, 02:31:41 AM

There's an old conundrum about the speed of light.

If I'm standing in the middle of the road at night, and a car is travelling towards me at the speed of light (299,792,458m/sec) with its headlights on, can I see its headlights or not?

   

SR says that light will travel at the same speed, but speed is relative.

That's where time dilation comes in.  Speed is measured as distance/time and if apparent distance is altered by your speed then time changes to make it all work out.

Quote from: jroa on January 01, 2015, 09:22:21 AM

Quote from: ausGeoff on January 01, 2015, 02:31:41 AM

There's an old conundrum about the speed of light.

If I'm standing in the middle of the road at night, and a car is travelling towards me at the speed of light (299,792,458m/sec) with its headlights on, can I see its headlights or not?

   

SR says that light will travel at the same speed, but speed is relative.

That's where time dilation comes in.  Speed is measured as distance/time and if apparent distance is altered by your speed then time changes to make it all work out.

If we look at the conundrum saying a "car" is approaching at the speed of light. Unless I'm wrong doesn't the theory of relativity say that a solid object going the speed of light would have its mass increased to infinite therefore reducing its speed? Being paradox-like in its conclusion we can probably say that once the car achieves light speed it would automatically slow down but the light from the headlights would reach you therefore making the approaching car no different than a car travelling at normal speed.

Quote from: mikeman7918 on January 01, 2015, 10:43:48 AM

Quote from: jroa on January 01, 2015, 09:22:21 AM

Quote from: ausGeoff on January 01, 2015, 02:31:41 AM

There's an old conundrum about the speed of light.

If I'm standing in the middle of the road at night, and a car is travelling towards me at the speed of light (299,792,458m/sec) with its headlights on, can I see its headlights or not?

   

SR says that light will travel at the same speed, but speed is relative.

That's where time dilation comes in.  Speed is measured as distance/time and if apparent distance is altered by your speed then time changes to make it all work out.

If we look at the conundrum saying a "car" is approaching at the speed of light. Unless I'm wrong doesn't the theory of relativity say that a solid object going the speed of light would have its mass increased to infinite therefore reducing its speed? Being paradox-like in its conclusion we can probably say that once the car achieves light speed it would automatically slow down but the light from the headlights would reach you therefore making the approaching car no different than a car travelling at normal speed.

It's relativistic mass goes to infinity as does it's energy. As such, nothing with mass can go the speed of light.