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## Summary:

- Is it possible to test to see if light misses a target when the inferometer moves?

## Main Question or Discussion Point

I am totally new to the theory of Special Relativity, but find it very facinating. As a young man I saw a few documentaries on how Einstein saw a clock's movement reaching noon, and how he, travelling in a tram heard the gong only later. He then thought about what if he travelled at the speed of light.

This is just nice things to think about.

I now, after 30 years or so, decided that I would love to understand Special Relativity. As I spoke to people about the theory, I learned that I do not understand how someone travelling very fast, measurable by a fraction of c, would undergo Time dilation. Forget about length contraction, that is even worse for me to understand how a train travelling at say .95% of c will be able to fit in a double garage.

Then some patient people went into depth on what will happen if say one is able to travel just below c towards the moon, that I moved closer to earth to 300 000 km and not the standard 365k.

I even said I will have a clock on Earth, one on the moon and one in the space ship.

I was assured that if I reach the Moon, my clock on the ship will be slower than the one on the moon.

One guy told me that if this is possible, everyone comparing these two clocks will have one of 2 reactions.

1. They will shake their heads and will not understand it,

2. They will know it was Time dilation and will be able to correlate the difference with Lorentz' transformation.

The more I asked to explain the reasons, the more he told me to learn the Mathematical equation then I will understand it.

To my horror I realised that my algebra was very bad, and I set out to get the transformation equation under my belt.

I also realised that I did not understand what the reasons behind the maths was.

A few great gents on this forum did assist me with a lot I did not know.

Well, I am still not a master of SR, but I do understand where it comes from.

Now, this is one thing I picked up that made my mind ring.

The Michelson Morley inferometer.

The inferometer shows that if a light beam travells in a straight path, through a splitter beam, and gets reflected back to the splitter beam and arrives in a telescope eye piece, it will show that a light beam that travelled perpendicular from this beam, thereby taking a longer path, will also arrive at the exact same time.

Even when they turned this inferometer, and waited 6 months longer and turned it any which way, the inferometer showed the light beam still did not arrive at different times.

I then remember how many "thought experiments" animators made on You Tube, where a train with a "Light clock" travelling at a great speed, say 50% of c, will experience Time dilation, and the light beam will reach the ceiling and floor at exactly the same moment as the beam of a stationary clock.

After I was helped in this forum, I thought, but there is a way to see if this is true.

Now I wonder, has anyone ever done this experiment?

Take a high mountain peak and shine a laser to anothe peak where there is reflecting mirrors concentrating and sending the beam back and forth a few times just to get a lot of distance. (but still short enough to visually see the endpoint on a target board.

What will this light beam show on the target board when Earth's movement is disrupted by the Moon attraction during its different phases?

What will the beam show during the full elipse of the Earth around the sun during all the seasons where the Earth's speed varies?

It is true that the Earth is a moving entity in space, but will it mean the light beam will remain on the bulls eye?

Or will it drift?

Please let me know if such experiments was done.

Greetings

This is just nice things to think about.

I now, after 30 years or so, decided that I would love to understand Special Relativity. As I spoke to people about the theory, I learned that I do not understand how someone travelling very fast, measurable by a fraction of c, would undergo Time dilation. Forget about length contraction, that is even worse for me to understand how a train travelling at say .95% of c will be able to fit in a double garage.

Then some patient people went into depth on what will happen if say one is able to travel just below c towards the moon, that I moved closer to earth to 300 000 km and not the standard 365k.

I even said I will have a clock on Earth, one on the moon and one in the space ship.

I was assured that if I reach the Moon, my clock on the ship will be slower than the one on the moon.

One guy told me that if this is possible, everyone comparing these two clocks will have one of 2 reactions.

1. They will shake their heads and will not understand it,

2. They will know it was Time dilation and will be able to correlate the difference with Lorentz' transformation.

The more I asked to explain the reasons, the more he told me to learn the Mathematical equation then I will understand it.

To my horror I realised that my algebra was very bad, and I set out to get the transformation equation under my belt.

I also realised that I did not understand what the reasons behind the maths was.

A few great gents on this forum did assist me with a lot I did not know.

Well, I am still not a master of SR, but I do understand where it comes from.

Now, this is one thing I picked up that made my mind ring.

The Michelson Morley inferometer.

The inferometer shows that if a light beam travells in a straight path, through a splitter beam, and gets reflected back to the splitter beam and arrives in a telescope eye piece, it will show that a light beam that travelled perpendicular from this beam, thereby taking a longer path, will also arrive at the exact same time.

Even when they turned this inferometer, and waited 6 months longer and turned it any which way, the inferometer showed the light beam still did not arrive at different times.

I then remember how many "thought experiments" animators made on You Tube, where a train with a "Light clock" travelling at a great speed, say 50% of c, will experience Time dilation, and the light beam will reach the ceiling and floor at exactly the same moment as the beam of a stationary clock.

After I was helped in this forum, I thought, but there is a way to see if this is true.

Now I wonder, has anyone ever done this experiment?

Take a high mountain peak and shine a laser to anothe peak where there is reflecting mirrors concentrating and sending the beam back and forth a few times just to get a lot of distance. (but still short enough to visually see the endpoint on a target board.

What will this light beam show on the target board when Earth's movement is disrupted by the Moon attraction during its different phases?

What will the beam show during the full elipse of the Earth around the sun during all the seasons where the Earth's speed varies?

It is true that the Earth is a moving entity in space, but will it mean the light beam will remain on the bulls eye?

Or will it drift?

Please let me know if such experiments was done.

Greetings