Go to Home Page
You are here
Go to Reference Section
Go to Directories Section
Go to Community Section
Go to Fun Section
Go to Science Store
Go to About PhysLink.com
Club PhysLink
   Not a member yet?
   Get Free Membership
   Username:
   
   Password:
   
    Remember me
   
   Forgot your login?
Top Destinations Menu
 Ask the ExpertsAsk the
Experts

 Physics and Astronomy Departments DirectoryUniversity
Departments

 Discussion ForumsDiscussion
Forums

 Online Chat Online
Chat

 FREE Einstein eCardsEinstein
eGreetings

 PhysLink.com Science eStoreScience
eStore

Community

Chikrii Word2TeX Software

Click here for a free 2-week trial

Become a Sponsor


   Question

If an electron were increased to the size of an apple, how big, proportionately, would a human being be?

Asked by: Lou Spadaccini

Answer

Well, the classical radius of an electron (this is the 'electo-magnetic field' type of radius - nobody has actually measured the exact radius of an electron.) is about 2.82 x 10-15 m. An average size of an apple is about 4 cm or 0.04 m in radius (at least the apples I just got today from the supermarket:-).

So the scalling factor is just: radius of the apple / radius of the electron which is: 4 x 10-2 m / 2.82 x 10-15 m = 1.42 x 1013

This means that in the universe where the electron is as big as an apple in ours everything will be bigger by a factor of 1.42 x 1013 or 14,200,000,000,000 (fourteen trillion and two hundred billion times bigger.)

So now you can calculate how big would the human be: for example I am 6 ft (1.83 m) tall so in your apple-sized-electron universe I would be: 1.83 m x 1.42 x 1013 = 2.6 x 1013 m tall! Just to give you an idea how tall I would be: it would take light a full day to travel from my toes to my nose! (and it only takes about 8 minutes for light to travel from the Sun to the Earth.) Also, I would be about 3.5 times taller than the diameter of our Solar System (farthest reaches of the Pluto orbit are at about 7.37 x 1012 m.)

Answered by: Anton Skorucak, M.S. Physics, PhysLink.com Creator


go to the top  
Advertisement:



All rights reserved. © Copyright '1995-'2004 PhysLink.com