# Time and physicality of dimensions

• Octavianus
In summary, the three space dimensions are no more physically (as in materially) real than the time dimension, but that only the mass that exists in the dimensions are real in a material sense.
Octavianus
Is it correct to say that the three space dimensions are no more physically (as in materially) real than the time dimension, but that only the mass that exists in the dimensions are real in a material sense?
I have a suspicion that why som people insist that time (and spacetime) does not exist, not even as a dimension, is that a ruler can measure something tangible (mass), like the length, width and height of an ice cube, while a clock measures something not directly tangible (a process), like how long it takes for the ice cube to melt.

Three dimensions of space, one dimension of time, along with matter having mass and energy without mass are valid ways of understanding the world around us, and us, too, for that matter.

Next time you go to buy a big screen TV and borrow money to pay for it and lug it home and get your electric bill to watch it, you'll find out just how real they all are.

Octavianus said:
Is it correct to say that the three space dimensions are no more physically (as in materially) real than the time dimension, but that only the mass that exists in the dimensions are real in a material sense?
I have a suspicion that why som people insist that time (and spacetime) does not exist, not even as a dimension, is that a ruler can measure something tangible (mass), like the length, width and height of an ice cube, while a clock measures something not directly tangible (a process), like how long it takes for the ice cube to melt.

If you always drove at 60 mph along an interstate going from Cininnati to Cleveland, you could put time marks along the side of the road and keep track of your progress with time measurements. That's basically what you are doing when you move along the 4th spatial dimension at speed c and make time readings. A mechanical clock just marks off time points along the world line (extended along the 4th dimension). That doesn't make the world line "time" any more than the time marks along the interstate makes the interstate "time." A typical world line might extend for 10^13 miles along the 4th dimension.

Octavianus said:
Is it correct to say that the three space dimensions are no more physically (as in materially) real than the time dimension, but that only the mass that exists in the dimensions are real in a material sense?

This would depend completely on the definition of the words "real" and "material." If you don't provide your definition of those words, then we can't have a meaningful discussion.

Octavianus said:
only the mass that exists in the dimensions are real in a material sense?
Generally only matter will be anything "in a material sense." After all, "matter" is the root word of "material."

Mass is not matter, mass is a property of matter, like charge.

## 1. What is the concept of time in relation to dimensions?

The concept of time in relation to dimensions is complex and still not fully understood. According to the theory of relativity, time is relative and can vary depending on the observer's perspective and the presence of gravity. In the context of dimensions, time is often seen as the fourth dimension and is intertwined with the other three dimensions of space.

## 2. How do dimensions affect the perception of time?

Dimensions can affect the perception of time in various ways. In higher dimensions, time may seem to move slower or faster compared to our three-dimensional world. Additionally, the concept of time may be completely different in other dimensions, where it may not be linear or may not even exist at all.

## 3. Is time travel possible through dimensions?

The possibility of time travel through dimensions is a topic of debate among scientists. Some theories, such as string theory, suggest that time travel may be possible by manipulating higher dimensions. However, there is currently no concrete evidence or technology to support this idea.

## 4. How do dimensions impact the physical laws of the universe?

Dimensions play a significant role in the physical laws of the universe. The number of dimensions present in our universe affects the fundamental forces and constants, such as gravity and the speed of light. In higher dimensions, these laws may be different, leading to alternative universes with different physical properties.

## 5. Can we ever fully understand the concept of dimensions and time?

As a scientist, I believe that our understanding of dimensions and time will continue to evolve and deepen as we make new discoveries and advancements in technology. However, it is possible that some aspects of these concepts may always remain a mystery to us due to the limitations of our human understanding and perception.

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