Math Is Fun Forum

Keckman

Member

From: Helsinki Finland

Registered: 2022-12-13

Posts: 14

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How small is Planck's time?

Let's try to figure out...

rebol[]
rH: 2 * 53e-12; the diameter of a hydrogen atom m
UNIage: 13.82 * 1000000000 * 365.25 * 24 * 60 * 60; the age of the universe in seconds
PlaTime: 5.39124760E-44; Planck time in seconds
c: 299792458; Speed of light m/s
age2: 60 * 60 * 24 * 365.25 * UNIage * PlaTime
dist: age2 * c
print rejoin["If the length of a year shrunk to a Planck time, the age of the universe would be " age2 " seconds, in which time light travels " dist " meters, whcich is " round/to (dist / rH) 0.0001 " times diameter of a hydrogen atom."]
halt

output:
If the length of a year shrunk to a Planck time, the age of the universe would be 7.42002306076851E-19 seconds, in which time light travels 2.2244669518044
7E-10 meters, whcich is 2.0986 times diameter of a hydrogen atom. Huh! Small?!