Writer's Block: Double vision

[matt1993]

galadwen85
Double vision
If there was a parallel universe, in what ways would you want your double to differ from you?

Answer View Answers

Not autistic. And married to Enya.

!lanruoj ruoy ot tsoP

Comments

[matt1993]

Me too.

Another thing I contemplate sometimes: if space and time are equivalent, does that mean that the size of the universe is the same as the amount of time that it will last?

In other words, since the whole universe is at least 78 billion light years in diameter, which converts to about 4.6×10⁶¹ Planck lengths, then maybe the universe will only last 4.6×10⁶¹ Planck times or about 2.683730211×10⁹⁷ years.

[matt1993]

:)

[matt1993]

A Planck length is what is thought to be the smallest possible unit of length, defined as 1.616252×10⁻³⁵ meters. The 10^-35 means you move the decimal point to the left 35 places and put zeroes in all the blank spaces between it and the number, so a Planck length equals .00000000000000000000000000000000001616252 meters. (Simpler example: 1.5×10^-2 = .015)

The minimum diameter of the universe is 78 billion light years (a light year is the distance light travels in a year). A light year is 10¹⁶ meters = 1×10¹⁶ meters = 10,000,000,000,000,000 meters.

So to convert the minimum diameter of the universe to Planck lengths:

78,000,000,000 light years × 10,000,000,000,000,000 meters/light year ÷ .00000000000000000000000000000000001616252 meters/Planck length ≈ (≈ means approximately equal to) 4.6×10⁶¹ Planck lengths.

The theory I came up with is based on the assumption that the universe will last as many Planck times as its diameter has Planck lengths. (A Planck time is the time it takes light to travel one Planck length, so it's similarly thought to be the smallest possible unit of light)

4.6×10⁶¹ Planck times × 5.39124×10^-44 seconds/Planck time ÷ 86,400 seconds/day ÷ 365.2425 days/year ≈ 78,587,133,510 years. (I had miscalculated when I said 2.683730211×10⁹⁷ years; a year should not be less than a Planck time!)

Let me know if there's something you still don't understand :)

[matt1993]

:) Thanks!